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

src/parsing/duplicate-finder.h

 // Copyright 2011 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_PARSING_DUPLICATE_FINDER_H_
 #define V8_PARSING_DUPLICATE_FINDER_H_
 
 #include "src/base/hashmap.h"
 #include "src/collector.h"
 
@@ skipping 35 matching lines @@
   // form.
   static bool IsNumberCanonical(Vector<const uint8_t> key);
 
   // Size of buffer. Sufficient for using it to call DoubleToCString in
   // from conversions.h.
   static const int kBufferSize = 100;
 
   UnicodeCache* unicode_constants_;
   // Backing store used to store strings used as hashmap keys.
   SequenceCollector<unsigned char> backing_store_;
-  base::HashMap map_;
+  base::CustomMatcherHashMap map_;
   // Buffer used for string->number->canonical string conversions.
   char number_buffer_[kBufferSize];
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_DUPLICATE_FINDER_H_