[base] Remove PointersMatch, making a separate std::equals hashmap

src/profiler/heap-snapshot-generator.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_PROFILER_HEAP_SNAPSHOT_GENERATOR_H_
 #define V8_PROFILER_HEAP_SNAPSHOT_GENERATOR_H_
 
 #include <unordered_map>
 
 #include "include/v8-profiler.h"
@@ skipping 507 matching lines @@
   }
 
   NativeGroupRetainedObjectInfo* FindOrAddGroupInfo(const char* label);
 
   Isolate* isolate_;
   HeapSnapshot* snapshot_;
   StringsStorage* names_;
   bool embedder_queried_;
   HeapObjectsSet in_groups_;
   // RetainedObjectInfo* -> List<HeapObject*>*
-  base::HashMap objects_by_info_;
-  base::HashMap native_groups_;
+  base::CustomMatcherHashMap objects_by_info_;
+  base::CustomMatcherHashMap native_groups_;
   HeapEntriesAllocator* synthetic_entries_allocator_;
   HeapEntriesAllocator* native_entries_allocator_;
   // Used during references extraction.
   SnapshotFiller* filler_;
 
   static HeapThing const kNativesRootObject;
 
   friend class GlobalHandlesExtractor;
 
   DISALLOW_COPY_AND_ASSIGN(NativeObjectsExplorer);
@@ skipping 66 matching lines @@
   void SerializeTraceNode(AllocationTraceNode* node);
   void SerializeTraceNodeInfos();
   void SerializeSamples();
   void SerializeString(const unsigned char* s);
   void SerializeStrings();
 
   static const int kEdgeFieldsCount;
   static const int kNodeFieldsCount;
 
   HeapSnapshot* snapshot_;
-  base::HashMap strings_;
+  base::CustomMatcherHashMap strings_;
   int next_node_id_;
   int next_string_id_;
   OutputStreamWriter* writer_;
 
   friend class HeapSnapshotJSONSerializerEnumerator;
   friend class HeapSnapshotJSONSerializerIterator;
 
   DISALLOW_COPY_AND_ASSIGN(HeapSnapshotJSONSerializer);
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PROFILER_HEAP_SNAPSHOT_GENERATOR_H_