[Experimental, DO NOT LAND] bucket num 4

base/trace_event/heap_profiler_allocation_register.h

 // Copyright 2015 The Chromium 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 BASE_TRACE_EVENT_HEAP_PROFILER_ALLOCATION_REGISTER_H_
 #define BASE_TRACE_EVENT_HEAP_PROFILER_ALLOCATION_REGISTER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <utility>
 
 #include "base/bits.h"
 #include "base/logging.h"
 #include "base/macros.h"
+#include "base/memory/address_hasher.h"
 #include "base/process/process_metrics.h"
 #include "base/template_util.h"
 #include "base/trace_event/heap_profiler_allocation_context.h"
 #include "build/build_config.h"
 
 namespace base {
 namespace trace_event {
 
 class AllocationRegisterTest;
 
@@ skipping 308 matching lines @@
               // and decremented when the allocation is removed. When the
               // number drops to zero, the backtrace is removed from the map.
       BacktraceHasher>;
 
   struct AllocationInfo {
     size_t size;
     const char* type_name;
     BacktraceMap::KVIndex backtrace_index;
   };
 
-  struct AddressHasher {
-    size_t operator () (const void* address) const;
-  };
-
   using AllocationMap = internal::FixedHashMap<
       kAllocationBuckets,
       const void*,
       AllocationInfo,
       AddressHasher>;
 
   BacktraceMap::KVIndex InsertBacktrace(const Backtrace& backtrace);
   void RemoveBacktrace(BacktraceMap::KVIndex index);
 
   Allocation GetAllocation(AllocationMap::KVIndex) const;
 
   AllocationMap allocations_;
   BacktraceMap backtraces_;
 
   DISALLOW_COPY_AND_ASSIGN(AllocationRegister);
 };
 
 }  // namespace trace_event
 }  // namespace base
 
 #endif  // BASE_TRACE_EVENT_HEAP_PROFILER_ALLOCATION_REGISTER_H_