[base] Template MatchFun in TemplateHashMapImpl

src/address-map.h

 // Copyright 2015 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_ADDRESS_MAP_H_
 #define V8_ADDRESS_MAP_H_
 
 #include "src/assert-scope.h"
 #include "src/base/hashmap.h"
 #include "src/objects.h"
@@ skipping 171 matching lines @@
   uint32_t bitfield_;
 
   friend class SerializerReferenceMap;
 };
 
 // Mapping objects to their location after deserialization.
 // This is used during building, but not at runtime by V8.
 class SerializerReferenceMap : public AddressMapBase {
  public:
   SerializerReferenceMap()
-      : no_allocation_(),
-        map_(base::HashMap::PointersMatch),
-        attached_reference_index_(0) {}
+      : no_allocation_(), map_(), attached_reference_index_(0) {}
 
   SerializerReference Lookup(HeapObject* obj) {
     base::HashMap::Entry* entry = LookupEntry(&map_, obj, false);
     return entry ? SerializerReference(GetValue(entry)) : SerializerReference();
   }
 
   void Add(HeapObject* obj, SerializerReference b) {
     DCHECK(b.is_valid());
     DCHECK_NULL(LookupEntry(&map_, obj, false));
     base::HashMap::Entry* entry = LookupEntry(&map_, obj, true);
@@ skipping 11 matching lines @@
   DisallowHeapAllocation no_allocation_;
   base::HashMap map_;
   int attached_reference_index_;
   DISALLOW_COPY_AND_ASSIGN(SerializerReferenceMap);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_ADDRESS_MAP_H_