Add ContainsKey() and ContainsValue() and use them where appropriate.

R=ochang@chromium.org

Review URL: https://codereview.chromium.org/1540263003 .

4 files changed, 16 insertions, 19 deletions

diff --git a/core/src/fpdfapi/fpdf_font/fpdf_font.cpp b/core/src/fpdfapi/fpdf_font/fpdf_font.cpp
index 7b3f8055fb..a3de6f2777 100644
--- a/core/src/fpdfapi/fpdf_font/fpdf_font.cpp
+++ b/core/src/fpdfapi/fpdf_font/fpdf_font.cpp
@@ -13,6 +13,7 @@
 #include "core/include/fpdfapi/fpdf_resource.h"
 #include "core/include/fxcrt/fx_ext.h"
 #include "core/include/fxge/fx_freetype.h"
+#include "third_party/base/stl_util.h"
 
 #if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
 #include "core/src/fxge/apple/apple_int.h"
@@ -1727,7 +1728,7 @@ CPDF_Type3Char* CPDF_Type3Font::LoadChar(FX_DWORD charcode, int level) {
   rcBBox.top = FXSYS_round(char_rect.top * 1000);
   rcBBox.bottom = FXSYS_round(char_rect.bottom * 1000);
 
-  FXSYS_assert(m_CacheMap.find(charcode) == m_CacheMap.end());
+  ASSERT(!pdfium::ContainsKey(m_CacheMap, charcode));
   CPDF_Type3Char* pCachedChar = pNewChar.release();
   m_CacheMap[charcode] = pCachedChar;
   if (pCachedChar->m_pForm->CountObjects() == 0) {
diff --git a/core/src/fpdfapi/fpdf_font/ttgsubtable.cpp b/core/src/fpdfapi/fpdf_font/ttgsubtable.cpp
index 035ea8a0ff..b10aa6952a 100644
--- a/core/src/fpdfapi/fpdf_font/ttgsubtable.cpp
+++ b/core/src/fpdfapi/fpdf_font/ttgsubtable.cpp
@@ -9,6 +9,7 @@
 #include "core/include/fxge/fx_freetype.h"
 #include "core/include/fxge/fx_ge.h"
 #include "third_party/base/nonstd_unique_ptr.h"
+#include "third_party/base/stl_util.h"
 
 CFX_GlyphMap::CFX_GlyphMap() {}
 CFX_GlyphMap::~CFX_GlyphMap() {}
@@ -86,7 +87,7 @@ bool CFX_CTTGSUBTable::GetVerticalGlyph(uint32_t glyphnum,
                 k);
           if (FeatureList.FeatureRecord[index].FeatureTag == tag[0] ||
               FeatureList.FeatureRecord[index].FeatureTag == tag[1]) {
-            if (m_featureMap.find(index) == m_featureMap.end()) {
+            if (!pdfium::ContainsKey(m_featureMap, index)) {
               m_featureMap[index] = index;
             }
           }
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp
index 1322864757..b94a6d91b3 100644
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp
+++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp
@@ -7,6 +7,7 @@
 #include "core/include/fpdfapi/fpdf_parser.h"
 
 #include "core/include/fxcrt/fx_string.h"
+#include "third_party/base/stl_util.h"
 
 namespace {
 
@@ -284,12 +285,10 @@ CPDF_Object* CPDF_Object::CloneInternal(FX_BOOL bDirect,
     case PDFOBJ_REFERENCE: {
       const CPDF_Reference* pRef = AsReference();
       FX_DWORD obj_num = pRef->GetRefObjNum();
-      if (bDirect && visited->find(obj_num) == visited->end()) {
+      if (bDirect && !pdfium::ContainsKey(*visited, obj_num)) {
         visited->insert(obj_num);
-        if (!pRef->GetDirect())
-          return nullptr;
-
-        return pRef->GetDirect()->CloneInternal(TRUE, visited);
+        auto* pDirect = pRef->GetDirect();
+        return pDirect ? pDirect->CloneInternal(TRUE, visited) : nullptr;
       }
       return new CPDF_Reference(pRef->m_pObjList, obj_num);
     }
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
index d9697000e5..d5a2780980 100644
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
+++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
@@ -596,7 +596,7 @@ FX_BOOL CPDF_Parser::LoadAllCrossRefV5(FX_FILESIZE xrefpos) {
       return FALSE;
     }
     // Check for circular references.
-    if (seen_xrefpos.find(xrefpos) != seen_xrefpos.end()) {
+    if (pdfium::ContainsKey(seen_xrefpos, xrefpos)) {
       return FALSE;
     }
   }
@@ -1204,7 +1204,7 @@ CPDF_Object* CPDF_Parser::ParseIndirectObject(CPDF_IndirectObjects* pObjList,
   const int32_t offset = GetStreamFirst(pObjStream);
 
   // Read object numbers from |pObjStream| into a cache.
-  if (m_ObjCache.find(pObjStream) == m_ObjCache.end()) {
+  if (!pdfium::ContainsKey(m_ObjCache, pObjStream)) {
     for (int32_t i = GetStreamNCount(pObjStream); i > 0; --i) {
       FX_DWORD thisnum = syntax.GetDirectNum();
       FX_DWORD thisoff = syntax.GetDirectNum();
@@ -1634,7 +1634,7 @@ FX_BOOL CPDF_Parser::LoadLinearizedAllCrossRefV5(FX_FILESIZE xrefpos) {
       return FALSE;
     }
     // Check for circular references.
-    if (seen_xrefpos.find(xrefpos) != seen_xrefpos.end()) {
+    if (pdfium::ContainsKey(seen_xrefpos, xrefpos)) {
       return FALSE;
     }
   }
@@ -2766,7 +2766,7 @@ class CPDF_DataAvail final : public IPDF_DataAvail {
                              CPDF_PageNode* pPageNode,
                              IFX_DownloadHints* pHints);
   FX_BOOL CheckPageCount(IFX_DownloadHints* pHints);
-  FX_BOOL IsFirstCheck(int iPage);
+  bool IsFirstCheck(int iPage);
   void ResetFirstCheck(int iPage);
   FX_BOOL IsDataAvail(FX_FILESIZE offset,
                       FX_DWORD size,
@@ -3349,12 +3349,8 @@ FX_BOOL CPDF_DataAvail::PreparePageItem() {
   m_docStatus = PDF_DATAAVAIL_PAGETREE;
   return TRUE;
 }
-FX_BOOL CPDF_DataAvail::IsFirstCheck(int iPage) {
-  if (m_pageMapCheckState.find(iPage) != m_pageMapCheckState.end())
-    return FALSE;
-
-  m_pageMapCheckState.insert(iPage);
-  return TRUE;
+bool CPDF_DataAvail::IsFirstCheck(int iPage) {
+  return m_pageMapCheckState.insert(iPage).second;
 }
 void CPDF_DataAvail::ResetFirstCheck(int iPage) {
   m_pageMapCheckState.erase(iPage);
@@ -4381,9 +4377,9 @@ int CPDF_DataAvail::IsPageAvail(int32_t iPage, IFX_DownloadHints* pHints) {
     m_objs_array.RemoveAll();
     m_objnum_array.RemoveAll();
   }
-  if (m_pagesLoadState.find(iPage) != m_pagesLoadState.end()) {
+  if (pdfium::ContainsKey(m_pagesLoadState, iPage))
     return DataAvailable;
-  }
+
   if (m_bLinearized) {
     if ((FX_DWORD)iPage == m_dwFirstPageNo) {
       m_pagesLoadState.insert(iPage);