Unused FWL Classes.

This Cl removes several FWL classes that aren't removed. These include:
 * IFWL_Content
 * CFWL_ContentImp
 * CFWL_CustomPanelImp
 * CFWL_CustomImp
 * IFWL_Custom
 * IFWL_CustomPanel
 * IFWL_Proxy
 * CFWL_App

BUG=pdfium:468

Review URL: https://codereview.chromium.org/1883943002

15 files changed, 6 insertions, 517 deletions

diff --git a/BUILD.gn b/BUILD.gn
index 64f03e16c6..e27ce22992 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -42,9 +42,7 @@ config("pdfium_config") {
   }
 
   if (is_win) {
-    cflags += [
-      "/wd4267",
-    ]
+    cflags += [ "/wd4267" ]
   }
 
   if (is_clang || is_posix) {
@@ -1037,8 +1035,6 @@ if (pdf_enable_xfa) {
       "xfa/fwl/core/cfwl_widgetimpproperties.h",
       "xfa/fwl/core/fwl_appimp.cpp",
       "xfa/fwl/core/fwl_appimp.h",
-      "xfa/fwl/core/fwl_contentimp.cpp",
-      "xfa/fwl/core/fwl_contentimp.h",
       "xfa/fwl/core/fwl_error.h",
       "xfa/fwl/core/fwl_formimp.cpp",
       "xfa/fwl/core/fwl_formimp.h",
@@ -1062,16 +1058,12 @@ if (pdf_enable_xfa) {
       "xfa/fwl/core/ifwl_adapterthreadmgr.h",
       "xfa/fwl/core/ifwl_adapterwidgetmgr.h",
       "xfa/fwl/core/ifwl_app.h",
-      "xfa/fwl/core/ifwl_content.h",
-      "xfa/fwl/core/ifwl_custom.h",
-      "xfa/fwl/core/ifwl_custompanel.h",
       "xfa/fwl/core/ifwl_dataprovider.h",
       "xfa/fwl/core/ifwl_form.h",
       "xfa/fwl/core/ifwl_notedriver.h",
       "xfa/fwl/core/ifwl_noteloop.h",
       "xfa/fwl/core/ifwl_notethread.h",
       "xfa/fwl/core/ifwl_panel.h",
-      "xfa/fwl/core/ifwl_proxy.h",
       "xfa/fwl/core/ifwl_target.h",
       "xfa/fwl/core/ifwl_themeprovider.h",
       "xfa/fwl/core/ifwl_thread.h",
@@ -1082,8 +1074,6 @@ if (pdf_enable_xfa) {
       "xfa/fwl/core/ifwl_widgetmgr.h",
       "xfa/fwl/core/ifwl_widgetmgrdelegate.h",
       "xfa/fwl/core/include/ifwl_adaptertimermgr.h",
-      "xfa/fwl/lightwidget/cfwl_app.cpp",
-      "xfa/fwl/lightwidget/cfwl_app.h",
       "xfa/fwl/lightwidget/cfwl_barcode.cpp",
       "xfa/fwl/lightwidget/cfwl_barcode.h",
       "xfa/fwl/lightwidget/cfwl_checkbox.cpp",
diff --git a/xfa.gyp b/xfa.gyp
index a0de466975..8e050f7569 100644
--- a/xfa.gyp
+++ b/xfa.gyp
@@ -183,8 +183,6 @@
         "xfa/fwl/core/cfwl_widgetimpproperties.h",
         "xfa/fwl/core/fwl_appimp.cpp",
         "xfa/fwl/core/fwl_appimp.h",
-        "xfa/fwl/core/fwl_contentimp.cpp",
-        "xfa/fwl/core/fwl_contentimp.h",
         "xfa/fwl/core/fwl_error.h",
         "xfa/fwl/core/fwl_formimp.cpp",
         "xfa/fwl/core/fwl_formimp.h",
@@ -208,16 +206,12 @@
         "xfa/fwl/core/ifwl_adapterthreadmgr.h",
         "xfa/fwl/core/ifwl_adapterwidgetmgr.h",
         "xfa/fwl/core/ifwl_app.h",
-        "xfa/fwl/core/ifwl_content.h",
-        "xfa/fwl/core/ifwl_custom.h",
-        "xfa/fwl/core/ifwl_custompanel.h",
         "xfa/fwl/core/ifwl_dataprovider.h",
         "xfa/fwl/core/ifwl_form.h",
         "xfa/fwl/core/ifwl_notedriver.h",
         "xfa/fwl/core/ifwl_noteloop.h",
         "xfa/fwl/core/ifwl_notethread.h",
         "xfa/fwl/core/ifwl_panel.h",
-        "xfa/fwl/core/ifwl_proxy.h",
         "xfa/fwl/core/ifwl_target.h",
         "xfa/fwl/core/ifwl_themeprovider.h",
         "xfa/fwl/core/ifwl_thread.h",
@@ -228,8 +222,6 @@
         "xfa/fwl/core/ifwl_widgetmgr.h",
         "xfa/fwl/core/ifwl_widgetmgrdelegate.h",
         "xfa/fwl/core/include/ifwl_adaptertimermgr.h",
-        "xfa/fwl/lightwidget/cfwl_app.cpp",
-        "xfa/fwl/lightwidget/cfwl_app.h",
         "xfa/fwl/lightwidget/cfwl_barcode.cpp",
         "xfa/fwl/lightwidget/cfwl_barcode.h",
         "xfa/fwl/lightwidget/cfwl_checkbox.cpp",
diff --git a/xfa/fwl/core/fwl_contentimp.cpp b/xfa/fwl/core/fwl_contentimp.cpp
deleted file mode 100644
index 5bfac08df4..0000000000
--- a/xfa/fwl/core/fwl_contentimp.cpp
+++ /dev/null
@@ -1,94 +0,0 @@
-// Copyright 2014 PDFium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-
-#include "xfa/fwl/core/fwl_contentimp.h"
-
-#include "xfa/fwl/core/fwl_noteimp.h"
-#include "xfa/fwl/core/fwl_targetimp.h"
-#include "xfa/fwl/core/fwl_threadimp.h"
-#include "xfa/fwl/core/fwl_widgetimp.h"
-#include "xfa/fwl/core/fwl_widgetmgrimp.h"
-#include "xfa/fwl/core/ifwl_content.h"
-
-FWL_ERR IFWL_Content::InsertWidget(IFWL_Widget* pChild, int32_t nIndex) {
-  return static_cast<CFWL_ContentImp*>(GetImpl())->InsertWidget(pChild, nIndex);
-}
-FWL_ERR IFWL_Content::RemoveWidget(IFWL_Widget* pWidget) {
-  return static_cast<CFWL_ContentImp*>(GetImpl())->RemoveWidget(pWidget);
-}
-FWL_ERR IFWL_Content::RemoveAllWidgets() {
-  return static_cast<CFWL_ContentImp*>(GetImpl())->RemoveAllWidgets();
-}
-FWL_ERR IFWL_Content::GetMinSize(FX_FLOAT& fWidth, FX_FLOAT& fHeight) {
-  return static_cast<CFWL_ContentImp*>(GetImpl())->GetMinSize(fWidth, fHeight);
-}
-FWL_ERR IFWL_Content::SetMinSize(FX_FLOAT fWidth, FX_FLOAT fHeight) {
-  return static_cast<CFWL_ContentImp*>(GetImpl())->SetMinSize(fWidth, fHeight);
-}
-FWL_ERR IFWL_Content::GetMaxSize(FX_FLOAT& fWidth, FX_FLOAT& fHeight) {
-  return static_cast<CFWL_ContentImp*>(GetImpl())->GetMaxSize(fWidth, fHeight);
-}
-FWL_ERR IFWL_Content::SetMaxSize(FX_FLOAT fWidth, FX_FLOAT fHeight) {
-  return static_cast<CFWL_ContentImp*>(GetImpl())->SetMaxSize(fWidth, fHeight);
-}
-IFWL_Content::IFWL_Content() {}
-CFWL_ContentImp::CFWL_ContentImp(const CFWL_WidgetImpProperties& properties,
-                                 IFWL_Widget* pOuter)
-    : CFWL_WidgetImp(properties, pOuter),
-      m_fWidthMin(0),
-      m_fWidthMax(10000),
-      m_fHeightMin(0),
-      m_fHeightMax(10000) {}
-CFWL_ContentImp::~CFWL_ContentImp() {}
-FWL_ERR CFWL_ContentImp::InsertWidget(IFWL_Widget* pChild, int32_t nIndex) {
-  if (!pChild)
-    return FWL_ERR_Indefinite;
-  pChild->SetParent(m_pInterface);
-  if (nIndex == -1) {
-    return FWL_ERR_Succeeded;
-  }
-  CFWL_WidgetMgr* pMgr = static_cast<CFWL_WidgetMgr*>(FWL_GetWidgetMgr());
-  if (!pMgr)
-    return FWL_ERR_Indefinite;
-  pMgr->SetWidgetIndex(pChild, nIndex);
-  return FWL_ERR_Succeeded;
-}
-FWL_ERR CFWL_ContentImp::RemoveWidget(IFWL_Widget* pWidget) {
-  if (!pWidget)
-    return FWL_ERR_Indefinite;
-  pWidget->SetParent(NULL);
-  return FWL_ERR_Succeeded;
-}
-FWL_ERR CFWL_ContentImp::RemoveAllWidgets() {
-  CFWL_WidgetMgr* pMgr = static_cast<CFWL_WidgetMgr*>(FWL_GetWidgetMgr());
-  if (!pMgr)
-    return FWL_ERR_Indefinite;
-  while (IFWL_Widget* widget =
-             pMgr->GetWidget(m_pInterface, FWL_WGTRELATION_FirstChild)) {
-    pMgr->SetParent(NULL, widget);
-  }
-  return FWL_ERR_Succeeded;
-}
-FWL_ERR CFWL_ContentImp::GetMinSize(FX_FLOAT& fWidth, FX_FLOAT& fHeight) {
-  fWidth = m_fWidthMin;
-  fHeight = m_fHeightMin;
-  return FWL_ERR_Succeeded;
-}
-FWL_ERR CFWL_ContentImp::SetMinSize(FX_FLOAT fWidth, FX_FLOAT fHeight) {
-  m_fWidthMin = fWidth;
-  m_fHeightMin = fHeight;
-  return FWL_ERR_Succeeded;
-}
-FWL_ERR CFWL_ContentImp::GetMaxSize(FX_FLOAT& fWidth, FX_FLOAT& fHeight) {
-  fWidth = m_fWidthMax;
-  fHeight = m_fHeightMax;
-  return FWL_ERR_Succeeded;
-}
-FWL_ERR CFWL_ContentImp::SetMaxSize(FX_FLOAT fWidth, FX_FLOAT fHeight) {
-  m_fWidthMax = fWidth;
-  m_fHeightMax = fHeight;
-  return FWL_ERR_Succeeded;
-}
diff --git a/xfa/fwl/core/fwl_contentimp.h b/xfa/fwl/core/fwl_contentimp.h
deleted file mode 100644
index b7a44d3a53..0000000000
--- a/xfa/fwl/core/fwl_contentimp.h
+++ /dev/null
@@ -1,35 +0,0 @@
-// Copyright 2014 PDFium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-
-#ifndef XFA_FWL_CORE_FWL_CONTENTIMP_H_
-#define XFA_FWL_CORE_FWL_CONTENTIMP_H_
-
-#include "xfa/fwl/core/fwl_widgetimp.h"
-
-class IFWL_Widget;
-
-class CFWL_ContentImp : public CFWL_WidgetImp {
- public:
-  CFWL_ContentImp(const CFWL_WidgetImpProperties& properties,
-                  IFWL_Widget* pOuter);
-
-  virtual ~CFWL_ContentImp();
-  virtual FWL_ERR InsertWidget(IFWL_Widget* pChild, int32_t nIndex = -1);
-  virtual FWL_ERR RemoveWidget(IFWL_Widget* pWidget);
-  virtual FWL_ERR RemoveAllWidgets();
-  FWL_ERR GetMinSize(FX_FLOAT& fWidth, FX_FLOAT& fHeight);
-  FWL_ERR SetMinSize(FX_FLOAT fWidth, FX_FLOAT fHeight);
-  FWL_ERR GetMaxSize(FX_FLOAT& fWidth, FX_FLOAT& fHeight);
-  FWL_ERR SetMaxSize(FX_FLOAT fWidth, FX_FLOAT fHeight);
-
- protected:
-  FX_FLOAT m_fWidthMin;
-  FX_FLOAT m_fWidthMax;
-  FX_FLOAT m_fHeightMin;
-  FX_FLOAT m_fHeightMax;
-};
-
-#endif  // XFA_FWL_CORE_FWL_CONTENTIMP_H_
diff --git a/xfa/fwl/core/fwl_formimp.cpp b/xfa/fwl/core/fwl_formimp.cpp
index 27014d9d62..919f85f532 100644
--- a/xfa/fwl/core/fwl_formimp.cpp
+++ b/xfa/fwl/core/fwl_formimp.cpp
@@ -21,7 +21,6 @@
 #include "xfa/fwl/core/fwl_widgetmgrimp.h"
 #include "xfa/fwl/core/ifwl_adapterwidgetmgr.h"
 #include "xfa/fwl/core/ifwl_app.h"
-#include "xfa/fwl/core/ifwl_content.h"
 #include "xfa/fwl/core/ifwl_themeprovider.h"
 
 #define FWL_SYSBTNSIZE 21
@@ -127,9 +126,6 @@ FWL_ERR CFWL_FormImp::GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize) {
     FX_FLOAT fCXBorder = GetBorderSize(TRUE);
     FX_FLOAT fCYBorder = GetBorderSize(FALSE);
     FX_FLOAT fEdge = GetEdgeWidth();
-    if (m_pContent) {
-      m_pContent->GetWidgetRect(rect, TRUE);
-    }
     rect.height += fCapHeight + fCYBorder + fEdge + fEdge;
     rect.width += fCXBorder + fCXBorder + fEdge + fEdge;
   } else {
@@ -644,12 +640,6 @@ void CFWL_FormImp::Layout() {
 #ifndef FWL_UseMacSystemBorder
   ReSetSysBtn();
 #endif
-  if (m_pContent) {
-    CFX_RectF rtClient;
-    GetClientRect(rtClient);
-    m_pContent->SetWidgetRect(rtClient);
-    m_pContent->Update();
-  }
 }
 void CFWL_FormImp::ReSetSysBtn() {
   m_fCXBorder =
diff --git a/xfa/fwl/core/fwl_panelimp.cpp b/xfa/fwl/core/fwl_panelimp.cpp
index a3e304b810..29ff60634f 100644
--- a/xfa/fwl/core/fwl_panelimp.cpp
+++ b/xfa/fwl/core/fwl_panelimp.cpp
@@ -11,31 +11,13 @@
 #include "xfa/fwl/core/fwl_targetimp.h"
 #include "xfa/fwl/core/fwl_widgetimp.h"
 #include "xfa/fwl/core/fwl_widgetmgrimp.h"
-#include "xfa/fwl/core/ifwl_content.h"
-#include "xfa/fwl/core/ifwl_custompanel.h"
 #include "xfa/fwl/core/ifwl_panel.h"
-#include "xfa/fwl/core/ifwl_proxy.h"
 
-// static
-IFWL_Panel* IFWL_Panel::Create(CFWL_WidgetImpProperties& properties,
-                               IFWL_Widget* pOuter) {
-  IFWL_Panel* pPanel = new IFWL_Panel;
-  CFWL_PanelImp* pPanelImpl = new CFWL_PanelImp(properties, pOuter);
-  pPanel->SetImpl(pPanelImpl);
-  pPanelImpl->SetInterface(pPanel);
-  return pPanel;
-}
 IFWL_Panel::IFWL_Panel() {}
-IFWL_Content* IFWL_Panel::GetContent() {
-  return static_cast<CFWL_PanelImp*>(GetImpl())->GetContent();
-}
-FWL_ERR IFWL_Panel::SetContent(IFWL_Content* pContent) {
-  return static_cast<CFWL_PanelImp*>(GetImpl())->SetContent(pContent);
-}
 
 CFWL_PanelImp::CFWL_PanelImp(const CFWL_WidgetImpProperties& properties,
                              IFWL_Widget* pOuter)
-    : CFWL_WidgetImp(properties, pOuter), m_pContent(nullptr) {}
+    : CFWL_WidgetImp(properties, pOuter) {}
 CFWL_PanelImp::~CFWL_PanelImp() {}
 FWL_ERR CFWL_PanelImp::GetClassName(CFX_WideString& wsClass) const {
   wsClass = FWL_CLASS_Panel;
@@ -45,103 +27,8 @@ uint32_t CFWL_PanelImp::GetClassID() const {
   return FWL_CLASSHASH_Panel;
 }
 FWL_ERR CFWL_PanelImp::GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize) {
-  if (bAutoSize) {
-    if (m_pContent) {
-      m_pContent->GetWidgetRect(rect, TRUE);
-    }
-  } else {
+  if (!bAutoSize)
     rect = m_pProperties->m_rtWidget;
-  }
-  return FWL_ERR_Succeeded;
-}
-FWL_ERR CFWL_PanelImp::Update() {
-  if (m_pContent) {
-    CFX_RectF rtClient;
-    GetClientRect(rtClient);
-    IFWL_WidgetMgr* pWidgetMgr = FWL_GetWidgetMgr();
-    if (!pWidgetMgr)
-      return FWL_ERR_Indefinite;
 
-    m_pContent->SetWidgetRect(rtClient);
-    m_pContent->Update();
-  }
   return FWL_ERR_Succeeded;
 }
-IFWL_Content* CFWL_PanelImp::GetContent() {
-  return m_pContent;
-}
-FWL_ERR CFWL_PanelImp::SetContent(IFWL_Content* pContent) {
-  if (!pContent)
-    return FWL_ERR_Indefinite;
-  m_pContent = pContent;
-  return pContent->SetParent(m_pInterface);
-}
-class CFWL_CustomPanelImp : public CFWL_WidgetImp {
- public:
-  CFWL_CustomPanelImp(const CFWL_WidgetImpProperties& properties,
-                      IFWL_Widget* pOuter);
-  virtual ~CFWL_CustomPanelImp();
-  virtual FWL_ERR GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE);
-  virtual FWL_ERR Update();
-  virtual IFWL_Content* GetContent();
-  virtual FWL_ERR SetContent(IFWL_Content* pContent);
-  FWL_ERR SetProxy(IFWL_Proxy* pProxy);
-
- protected:
-  IFWL_Content* m_pContent;
-  IFWL_Proxy* m_pProxy;
-};
-CFWL_CustomPanelImp::CFWL_CustomPanelImp(
-    const CFWL_WidgetImpProperties& properties,
-    IFWL_Widget* pOuter)
-    : CFWL_WidgetImp(properties, pOuter),
-      m_pContent(nullptr),
-      m_pProxy(nullptr) {}
-CFWL_CustomPanelImp::~CFWL_CustomPanelImp() {}
-FWL_ERR CFWL_CustomPanelImp::GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize) {
-  if (bAutoSize && m_pProxy &&
-      (m_pProxy->GetWidgetRect(rect, bAutoSize) == FWL_ERR_Succeeded)) {
-    return FWL_ERR_Succeeded;
-  }
-  return CFWL_WidgetImp::GetWidgetRect(rect, bAutoSize);
-}
-FWL_ERR CFWL_CustomPanelImp::Update() {
-  if (m_pProxy) {
-    return m_pProxy->Update();
-  }
-  return CFWL_WidgetImp::Update();
-}
-IFWL_Content* CFWL_CustomPanelImp::GetContent() {
-  return m_pContent;
-}
-FWL_ERR CFWL_CustomPanelImp::SetContent(IFWL_Content* pContent) {
-  if (!pContent)
-    return FWL_ERR_Indefinite;
-  m_pContent = pContent;
-  return pContent->SetParent(m_pInterface);
-}
-FWL_ERR CFWL_CustomPanelImp::SetProxy(IFWL_Proxy* pProxy) {
-  m_pProxy = pProxy;
-  return FWL_ERR_Succeeded;
-}
-
-// statuc
-IFWL_CustomPanel* IFWL_CustomPanel::Create(CFWL_WidgetImpProperties& properties,
-                                           IFWL_Widget* pOuter) {
-  IFWL_CustomPanel* pCustomPanel = new IFWL_CustomPanel;
-  CFWL_CustomPanelImp* pCustomPanelImpl =
-      new CFWL_CustomPanelImp(properties, pOuter);
-  pCustomPanel->SetImpl(pCustomPanelImpl);
-  pCustomPanelImpl->SetInterface(pCustomPanel);
-  return pCustomPanel;
-}
-IFWL_CustomPanel::IFWL_CustomPanel() {}
-IFWL_Content* IFWL_CustomPanel::GetContent() {
-  return static_cast<CFWL_CustomPanelImp*>(GetImpl())->GetContent();
-}
-FWL_ERR IFWL_CustomPanel::SetContent(IFWL_Content* pContent) {
-  return static_cast<CFWL_CustomPanelImp*>(GetImpl())->SetContent(pContent);
-}
-FWL_ERR IFWL_CustomPanel::SetProxy(IFWL_Proxy* pProxy) {
-  return static_cast<CFWL_CustomPanelImp*>(GetImpl())->SetProxy(pProxy);
-}
diff --git a/xfa/fwl/core/fwl_panelimp.h b/xfa/fwl/core/fwl_panelimp.h
index 81e74c189b..34e236da1a 100644
--- a/xfa/fwl/core/fwl_panelimp.h
+++ b/xfa/fwl/core/fwl_panelimp.h
@@ -18,15 +18,10 @@ class CFWL_PanelImp : public CFWL_WidgetImp {
   CFWL_PanelImp(const CFWL_WidgetImpProperties& properties,
                 IFWL_Widget* pOuter);
   virtual ~CFWL_PanelImp();
+
   virtual FWL_ERR GetClassName(CFX_WideString& wsClass) const;
   virtual uint32_t GetClassID() const;
   virtual FWL_ERR GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE);
-  virtual FWL_ERR Update();
-  virtual IFWL_Content* GetContent();
-  virtual FWL_ERR SetContent(IFWL_Content* pContent);
-
- protected:
-  IFWL_Content* m_pContent;
 };
 
 #endif  // XFA_FWL_CORE_FWL_PANELIMP_H_
diff --git a/xfa/fwl/core/fwl_widgetimp.cpp b/xfa/fwl/core/fwl_widgetimp.cpp
index 19b2f2430a..0f895eb5d2 100644
--- a/xfa/fwl/core/fwl_widgetimp.cpp
+++ b/xfa/fwl/core/fwl_widgetimp.cpp
@@ -24,10 +24,7 @@
 #include "xfa/fwl/core/ifwl_adapterthreadmgr.h"
 #include "xfa/fwl/core/ifwl_adapterwidgetmgr.h"
 #include "xfa/fwl/core/ifwl_app.h"
-#include "xfa/fwl/core/ifwl_content.h"
-#include "xfa/fwl/core/ifwl_custom.h"
 #include "xfa/fwl/core/ifwl_form.h"
-#include "xfa/fwl/core/ifwl_proxy.h"
 #include "xfa/fwl/core/ifwl_themeprovider.h"
 
 #define FWL_CLASSHASH_Menu 3957949655
@@ -170,17 +167,9 @@ FWL_ERR CFWL_WidgetImp::Initialize() {
 }
 FWL_ERR CFWL_WidgetImp::Finalize() {
   NotifyDriver();
-  IFWL_Form* pForm = static_cast<IFWL_Form*>(
-      FWL_GetWidgetMgr()->GetWidget(m_pInterface, FWL_WGTRELATION_SystemForm));
-  if (pForm && pForm != m_pInterface) {
-    IFWL_Content* pContent = pForm->GetContent();
-    if (pContent) {
-      pContent->RemoveWidget(m_pInterface);
-    }
-  }
-  if (!IsChild()) {
+  if (!IsChild())
     m_pWidgetMgr->DestroyWidget_Native(m_pInterface);
-  }
+
   m_pWidgetMgr->RemoveWidget(m_pInterface);
   return FWL_ERR_Succeeded;
 }
@@ -1040,48 +1029,3 @@ FWL_ERR CFWL_WidgetImpDelegate::OnDrawWidget(CFX_Graphics* pGraphics,
   evt.m_pGraphics = pGraphics;
   return FWL_ERR_Succeeded;
 }
-class CFWL_CustomImp : public CFWL_WidgetImp {
- public:
-  CFWL_CustomImp(const CFWL_WidgetImpProperties& properties,
-                 IFWL_Widget* pOuter);
-  virtual FWL_ERR GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE);
-  virtual FWL_ERR Update();
-  virtual FWL_ERR SetProxy(IFWL_Proxy* pProxy);
-
- protected:
-  IFWL_Proxy* m_pProxy;
-};
-CFWL_CustomImp::CFWL_CustomImp(const CFWL_WidgetImpProperties& properties,
-                               IFWL_Widget* pOuter)
-    : CFWL_WidgetImp(properties, pOuter), m_pProxy(NULL) {}
-FWL_ERR CFWL_CustomImp::GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize) {
-  if (m_pProxy &&
-      (m_pProxy->GetWidgetRect(rect, bAutoSize) == FWL_ERR_Succeeded)) {
-    return FWL_ERR_Succeeded;
-  }
-  return CFWL_WidgetImp::GetWidgetRect(rect, bAutoSize);
-}
-FWL_ERR CFWL_CustomImp::Update() {
-  if (m_pProxy) {
-    return m_pProxy->Update();
-  }
-  return CFWL_WidgetImp::Update();
-}
-FWL_ERR CFWL_CustomImp::SetProxy(IFWL_Proxy* pProxy) {
-  m_pProxy = pProxy;
-  return FWL_ERR_Succeeded;
-}
-
-// static
-IFWL_Custom* IFWL_Custom::Create(const CFWL_WidgetImpProperties& properties,
-                                 IFWL_Widget* pOuter) {
-  IFWL_Custom* pCustom = new IFWL_Custom;
-  CFWL_CustomImp* pCustomImpl = new CFWL_CustomImp(properties, pOuter);
-  pCustom->SetImpl(pCustomImpl);
-  pCustomImpl->SetInterface(pCustom);
-  return pCustom;
-}
-IFWL_Custom::IFWL_Custom() {}
-FWL_ERR IFWL_Custom::SetProxy(IFWL_Proxy* pProxy) {
-  return static_cast<CFWL_CustomImp*>(GetImpl())->SetProxy(pProxy);
-}
diff --git a/xfa/fwl/core/ifwl_content.h b/xfa/fwl/core/ifwl_content.h
deleted file mode 100644
index 76292a609c..0000000000
--- a/xfa/fwl/core/ifwl_content.h
+++ /dev/null
@@ -1,30 +0,0 @@
-// Copyright 2014 PDFium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-
-#ifndef XFA_FWL_CORE_IFWL_CONTENT_H_
-#define XFA_FWL_CORE_IFWL_CONTENT_H_
-
-#include "xfa/fwl/core/fwl_widgetimp.h"
-#include "xfa/fwl/core/ifwl_widget.h"
-#include "core/fxcrt/include/fx_system.h"
-#include "xfa/fwl/core/fwl_error.h"
-
-class IFWL_Content : public IFWL_Widget {
- public:
-  static IFWL_Content* Create();
-  FWL_ERR InsertWidget(IFWL_Widget* pChild, int32_t nIndex = -1);
-  FWL_ERR RemoveWidget(IFWL_Widget* pWidget);
-  FWL_ERR RemoveAllWidgets();
-  FWL_ERR GetMinSize(FX_FLOAT& fWidth, FX_FLOAT& fHeight);
-  FWL_ERR SetMinSize(FX_FLOAT fWidth, FX_FLOAT fHeight);
-  FWL_ERR GetMaxSize(FX_FLOAT& fWidth, FX_FLOAT& fHeight);
-  FWL_ERR SetMaxSize(FX_FLOAT fWidth, FX_FLOAT fHeight);
-
- protected:
-  IFWL_Content();
-};
-
-#endif  // XFA_FWL_CORE_IFWL_CONTENT_H_
diff --git a/xfa/fwl/core/ifwl_custom.h b/xfa/fwl/core/ifwl_custom.h
deleted file mode 100644
index d7f1b40923..0000000000
--- a/xfa/fwl/core/ifwl_custom.h
+++ /dev/null
@@ -1,26 +0,0 @@
-// Copyright 2016 PDFium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-
-#ifndef XFA_FWL_CORE_IFWL_CUSTOM_H_
-#define XFA_FWL_CORE_IFWL_CUSTOM_H_
-
-#include "xfa/fwl/core/fwl_error.h"
-#include "xfa/fwl/core/ifwl_widget.h"
-
-class IFWL_Proxy;
-
-class IFWL_Custom : public IFWL_Widget {
- public:
-  static IFWL_Custom* Create(const CFWL_WidgetImpProperties& properties,
-                             IFWL_Widget* pOuter);
-
-  FWL_ERR SetProxy(IFWL_Proxy* pProxy);
-
- protected:
-  IFWL_Custom();
-};
-
-#endif  // XFA_FWL_CORE_IFWL_CUSTOM_H_
diff --git a/xfa/fwl/core/ifwl_custompanel.h b/xfa/fwl/core/ifwl_custompanel.h
deleted file mode 100644
index 3491227af0..0000000000
--- a/xfa/fwl/core/ifwl_custompanel.h
+++ /dev/null
@@ -1,28 +0,0 @@
-// Copyright 2016 PDFium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-
-#ifndef XFA_FWL_CORE_IFWL_CUSTOMPANEL_H_
-#define XFA_FWL_CORE_IFWL_CUSTOMPANEL_H_
-
-#include "xfa/fwl/core/fwl_widgetimp.h"
-#include "xfa/fwl/core/ifwl_widget.h"
-
-class IFWL_Proxy;
-
-class IFWL_CustomPanel : public IFWL_Widget {
- public:
-  static IFWL_CustomPanel* Create(CFWL_WidgetImpProperties& properties,
-                                  IFWL_Widget* pOuter);
-
-  IFWL_Content* GetContent();
-  FWL_ERR SetContent(IFWL_Content* pContent);
-  FWL_ERR SetProxy(IFWL_Proxy* pProxy);
-
- protected:
-  IFWL_CustomPanel();
-};
-
-#endif  // XFA_FWL_CORE_IFWL_CUSTOMPANEL_H_
diff --git a/xfa/fwl/core/ifwl_panel.h b/xfa/fwl/core/ifwl_panel.h
index ec9b02d3f7..2261703b94 100644
--- a/xfa/fwl/core/ifwl_panel.h
+++ b/xfa/fwl/core/ifwl_panel.h
@@ -10,19 +10,10 @@
 #include "xfa/fwl/core/fwl_widgetimp.h"
 #include "xfa/fwl/core/ifwl_widget.h"
 
-class IFWL_Content;
-
 #define FWL_CLASS_Panel L"FWL_Panel"
 #define FWL_CLASSHASH_Panel 881567292
 
 class IFWL_Panel : public IFWL_Widget {
- public:
-  static IFWL_Panel* Create(CFWL_WidgetImpProperties& properties,
-                            IFWL_Widget* pOuter);
-
-  IFWL_Content* GetContent();
-  FWL_ERR SetContent(IFWL_Content* pContent);
-
  protected:
   IFWL_Panel();
 };
diff --git a/xfa/fwl/core/ifwl_proxy.h b/xfa/fwl/core/ifwl_proxy.h
deleted file mode 100644
index 80393c5382..0000000000
--- a/xfa/fwl/core/ifwl_proxy.h
+++ /dev/null
@@ -1,21 +0,0 @@
-// Copyright 2016 PDFium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-
-#ifndef XFA_FWL_CORE_IFWL_PROXY_H_
-#define XFA_FWL_CORE_IFWL_PROXY_H_
-
-#include "core/fxcrt/include/fx_coordinates.h"
-#include "core/fxcrt/include/fx_system.h"
-#include "xfa/fwl/core/fwl_error.h"
-
-class IFWL_Proxy {
- public:
-  virtual ~IFWL_Proxy() {}
-  virtual FWL_ERR GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE) = 0;
-  virtual FWL_ERR Update() = 0;
-};
-
-#endif  // XFA_FWL_CORE_IFWL_PROXY_H_
diff --git a/xfa/fwl/lightwidget/cfwl_app.cpp b/xfa/fwl/lightwidget/cfwl_app.cpp
deleted file mode 100644
index c09e5c0a26..0000000000
--- a/xfa/fwl/lightwidget/cfwl_app.cpp
+++ /dev/null
@@ -1,35 +0,0 @@
-// Copyright 2014 PDFium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-
-#include "xfa/fwl/lightwidget/cfwl_app.h"
-
-#include "core/fxcrt/include/fx_coordinates.h"
-#include "xfa/fwl/core/fwl_error.h"
-#include "xfa/fwl/core/ifwl_app.h"
-#include "xfa/fwl/lightwidget/cfwl_theme.h"
-
-CFWL_App::CFWL_App() : m_pIface(IFWL_App::Create(nullptr)), m_pTheme(nullptr) {}
-
-CFWL_App::~CFWL_App() {
-  if (m_pTheme) {
-    m_pTheme->Finalize();
-    delete m_pTheme;
-  }
-  m_pIface->Release();
-}
-
-FWL_ERR CFWL_App::Initialize() {
-  m_pTheme = new CFWL_Theme;
-  m_pTheme->Initialize();
-  m_pIface->SetThemeProvider(m_pTheme);
-  return m_pIface->Initialize();
-}
-
-FWL_ERR CFWL_App::Exit(int32_t iExitCode) {
-  if (!m_pIface)
-    return FWL_ERR_Indefinite;
-  return m_pIface->Exit(iExitCode);
-}
diff --git a/xfa/fwl/lightwidget/cfwl_app.h b/xfa/fwl/lightwidget/cfwl_app.h
deleted file mode 100644
index 24cbd5abb4..0000000000
--- a/xfa/fwl/lightwidget/cfwl_app.h
+++ /dev/null
@@ -1,31 +0,0 @@
-// Copyright 2014 PDFium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-
-#ifndef XFA_FWL_LIGHTWIDGET_CFWL_APP_H_
-#define XFA_FWL_LIGHTWIDGET_CFWL_APP_H_
-
-#include "xfa/fwl/core/fwl_error.h"
-
-class CFWL_Theme;
-class IFWL_App;
-
-class CFWL_App {
- public:
-  CFWL_App();
-  virtual ~CFWL_App();
-
-  FWL_ERR Initialize();
-  FWL_ERR Exit(int32_t iExitCode);
-
-  CFWL_Theme* GetTheme() const { return m_pTheme; }
-  IFWL_App* GetInterface() const { return m_pIface; }
-
- private:
-  IFWL_App* m_pIface;
-  CFWL_Theme* m_pTheme;
-};
-
-#endif  // XFA_FWL_LIGHTWIDGET_CFWL_APP_H_