Add chrome.memoryBenchmarking.requestMemoryDump() API

content/renderer/memory_benchmarking_extension.h

 // Copyright (c) 2013 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 CONTENT_RENDERER_MEMORY_BENCHMARKING_EXTENSION_H_
 #define CONTENT_RENDERER_MEMORY_BENCHMARKING_EXTENSION_H_
 
 #include "base/basictypes.h"
 #include "gin/wrappable.h"
 
@@ skipping 19 matching lines @@
   ~MemoryBenchmarkingExtension() override;
 
   // gin::Wrappable.
   gin::ObjectTemplateBuilder GetObjectTemplateBuilder(
       v8::Isolate* isolate) override;
 
   bool IsHeapProfilerRunning();
 
   void HeapProfilerDump(gin::Arguments* args);
 
+  void RequestMemoryDump(gin::Arguments* args);
+
   DISALLOW_COPY_AND_ASSIGN(MemoryBenchmarkingExtension);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEMORY_BENCHMARKING_EXTENSION_H_