Merge to XFA: Replace more CFX_MapPtrToPtr.

Original Review URL: https://codereview.chromium.org/1580573002 .
(cherry picked from commit a505d9d3e13485e090e50d5d83f882fb707d3f48)

R=ochang@chromium.org

Review URL: https://codereview.chromium.org/1610163003 .

2 files changed, 22 insertions, 17 deletions

diff --git a/core/src/fpdfdoc/doc_tagged.cpp b/core/src/fpdfdoc/doc_tagged.cpp
index d51743b0dc..3510eb6c8e 100644
--- a/core/src/fpdfdoc/doc_tagged.cpp
+++ b/core/src/fpdfdoc/doc_tagged.cpp
@@ -93,7 +93,7 @@ void CPDF_StructTreeImpl::LoadPageTree(const CPDF_Dictionary* pPageDict) {
   for (i = 0; i < dwKids; i++) {
     m_Kids[i] = NULL;
   }
-  CFX_MapPtrToPtr element_map;
+  std::map<CPDF_Dictionary*, CPDF_StructElementImpl*> element_map;
   CPDF_Dictionary* pParentTree = m_pTreeRoot->GetDict("ParentTree");
   if (!pParentTree) {
     return;
@@ -114,23 +114,25 @@ void CPDF_StructTreeImpl::LoadPageTree(const CPDF_Dictionary* pPageDict) {
     }
   }
 }
-CPDF_StructElementImpl* CPDF_StructTreeImpl::AddPageNode(CPDF_Dictionary* pDict,
-                                                         CFX_MapPtrToPtr& map,
-                                                         int nLevel) {
-  if (nLevel > nMaxRecursion) {
+CPDF_StructElementImpl* CPDF_StructTreeImpl::AddPageNode(
+    CPDF_Dictionary* pDict,
+    std::map<CPDF_Dictionary*, CPDF_StructElementImpl*>& map,
+    int nLevel) {
+  if (nLevel > nMaxRecursion)
     return NULL;
-  }
-  CPDF_StructElementImpl* pElement = NULL;
-  if (map.Lookup(pDict, (void*&)pElement)) {
-    return pElement;
-  }
-  pElement = new CPDF_StructElementImpl(this, NULL, pDict);
-  map.SetAt(pDict, pElement);
+
+  auto it = map.find(pDict);
+  if (it != map.end())
+    return it->second;
+
+  CPDF_StructElementImpl* pElement =
+      new CPDF_StructElementImpl(this, NULL, pDict);
+  map[pDict] = pElement;
   CPDF_Dictionary* pParent = pDict->GetDict("P");
   if (!pParent || pParent->GetString("Type") == "StructTreeRoot") {
     if (!AddTopLevelNode(pDict, pElement)) {
       pElement->Release();
-      map.RemoveKey(pDict);
+      map.erase(pDict);
     }
   } else {
     CPDF_StructElementImpl* pParentElement =
@@ -148,7 +150,7 @@ CPDF_StructElementImpl* CPDF_StructTreeImpl::AddPageNode(CPDF_Dictionary* pDict,
     }
     if (!bSave) {
       pElement->Release();
-      map.RemoveKey(pDict);
+      map.erase(pDict);
     }
   }
   return pElement;
diff --git a/core/src/fpdfdoc/tagged_int.h b/core/src/fpdfdoc/tagged_int.h
index b9ae86bc6a..7dc9549569 100644
--- a/core/src/fpdfdoc/tagged_int.h
+++ b/core/src/fpdfdoc/tagged_int.h
@@ -7,6 +7,8 @@
 #ifndef CORE_SRC_FPDFDOC_TAGGED_INT_H_
 #define CORE_SRC_FPDFDOC_TAGGED_INT_H_
 
+#include <map>
+
 #include "core/include/fpdfdoc/fpdf_tagged.h"
 
 class CPDF_StructElementImpl;
@@ -24,9 +26,10 @@ class CPDF_StructTreeImpl : public CPDF_StructTree {
 
   void LoadDocTree();
   void LoadPageTree(const CPDF_Dictionary* pPageDict);
-  CPDF_StructElementImpl* AddPageNode(CPDF_Dictionary* pElement,
-                                      CFX_MapPtrToPtr& map,
-                                      int nLevel = 0);
+  CPDF_StructElementImpl* AddPageNode(
+      CPDF_Dictionary* pElement,
+      std::map<CPDF_Dictionary*, CPDF_StructElementImpl*>& map,
+      int nLevel = 0);
   FX_BOOL AddTopLevelNode(CPDF_Dictionary* pDict,
                           CPDF_StructElementImpl* pElement);