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

src/heap/heap.cc

 // Copyright 2012 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.
 
 #include "src/heap/heap.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/ast/context-slot-cache.h"
 #include "src/base/bits.h"
@@ skipping 507 matching lines @@
       global_pretenuring_feedback_->LookupOrInsert(site,
                                                    ObjectHash(site->address()));
     }
   }
 }
 
 
 class Heap::PretenuringScope {
  public:
   explicit PretenuringScope(Heap* heap) : heap_(heap) {
-    heap_->global_pretenuring_feedback_ = new base::HashMap(
-        base::HashMap::PointersMatch, kInitialFeedbackCapacity);
+    heap_->global_pretenuring_feedback_ =
+        new base::HashMap(kInitialFeedbackCapacity);
   }
 
   ~PretenuringScope() {
     delete heap_->global_pretenuring_feedback_;
     heap_->global_pretenuring_feedback_ = nullptr;
   }
 
  private:
   Heap* heap_;
 };
@@ skipping 6000 matching lines @@
 }
 
 
 // static
 int Heap::GetStaticVisitorIdForMap(Map* map) {
   return StaticVisitorBase::GetVisitorId(map);
 }
 
 }  // namespace internal
 }  // namespace v8