[base] Optimise hashmaps with simple key equality

src/interpreter/constant-array-builder.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_INTERPRETER_CONSTANT_ARRAY_BUILDER_H_
 #define V8_INTERPRETER_CONSTANT_ARRAY_BUILDER_H_
 
 #include "src/identity-map.h"
 #include "src/interpreter/bytecodes.h"
 #include "src/zone/zone-containers.h"
@@ skipping 89 matching lines @@
 
     DISALLOW_COPY_AND_ASSIGN(ConstantArraySlice);
   };
 
   ConstantArraySlice* IndexToSlice(size_t index) const;
   ConstantArraySlice* OperandSizeToSlice(OperandSize operand_size) const;
 
   Handle<Object> the_hole_value() const { return the_hole_value_; }
 
   ConstantArraySlice* idx_slice_[3];
-  base::TemplateHashMapImpl<Address, index_t, std::equal_to<Address>,
+  base::TemplateHashMapImpl<Address, index_t, base::KeyEqual<Address>,
                             ZoneAllocationPolicy>
       constants_map_;
   ZoneMap<Smi*, index_t> smi_map_;
   ZoneVector<std::pair<Smi*, index_t>> smi_pairs_;
   Zone* zone_;
   Handle<Object> the_hole_value_;
 };
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_CONSTANT_ARRAY_BUILDER_H_