Make code compile with clang_use_chrome_plugin (part VI)

This change mainly contains files in xfa/fwl directory.
This is part of the efforts to make PDFium code compilable
by Clang chromium style plugins.

The changes are mainly the following:
-- move inline constructor/destructor of complex class/struct out-of-line;
-- add constructor/destructor of complex class/struct if not
 explicitly defined;
-- add explicit out-of-line copy constructor when needed;
-- move inline virtual functions out-of-line;
-- Properly mark virtual functions with 'override';
-- some minor cleanups;

BUG=pdfium:469

Review-Url: https://codereview.chromium.org/2070583003

1 files changed, 12 insertions, 10 deletions

diff --git a/xfa/fwl/core/cfwl_themepart.h b/xfa/fwl/core/cfwl_themepart.h
index 5bdf1530a5..c5e6cd7ff5 100644
--- a/xfa/fwl/core/cfwl_themepart.h
+++ b/xfa/fwl/core/cfwl_themepart.h
@@ -81,16 +81,7 @@ class IFWL_Widget;
 
 class CFWL_ThemePart {
  public:
-  CFWL_ThemePart()
-      : m_pWidget(nullptr),
-        m_iPart(CFWL_Part::None),
-        m_dwStates(CFWL_PartState_Normal),
-        m_bMaximize(false),
-        m_bStaticBackground(false),
-        m_pData(nullptr) {
-    m_rtPart.Reset();
-    m_matrix.SetIdentity();
-  }
+  CFWL_ThemePart();
 
   CFX_Matrix m_matrix;
   CFX_RectF m_rtPart;
@@ -102,4 +93,15 @@ class CFWL_ThemePart {
   void* m_pData;
 };
 
+inline CFWL_ThemePart::CFWL_ThemePart()
+    : m_pWidget(nullptr),
+      m_iPart(CFWL_Part::None),
+      m_dwStates(CFWL_PartState_Normal),
+      m_bMaximize(false),
+      m_bStaticBackground(false),
+      m_pData(nullptr) {
+  m_rtPart.Reset();
+  m_matrix.SetIdentity();
+}
+
 #endif  // XFA_FWL_CORE_CFWL_THEMEPART_H_