Add a benchmarking_extension API to call TCMalloc's HeapProfilerDump().

content/content_renderer.gypi

 # Copyright (c) 2012 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.
 
 {
   'dependencies': [
     '../jingle/jingle.gyp:jingle_glue',
     '../net/net.gyp:net',
     '../skia/skia.gyp:skia',
     '../third_party/hyphen/hyphen.gyp:hyphen',
@@ skipping 135 matching lines @@
     'renderer/media/stream_texture_factory_impl_android.cc',
     'renderer/media/stream_texture_factory_impl_android.h',
     'renderer/media/video_capture_impl.cc',
     'renderer/media/video_capture_impl.h',
     'renderer/media/video_capture_impl_manager.cc',
     'renderer/media/video_capture_impl_manager.h',
     'renderer/media/video_capture_message_filter.cc',
     'renderer/media/video_capture_message_filter.h',
     'renderer/media/webmediaplayer_proxy_impl_android.cc',
     'renderer/media/webmediaplayer_proxy_impl_android.h',
+    'renderer/memory_benchmarking_extension.cc',
+    'renderer/memory_benchmarking_extension.h',
     'renderer/mhtml_generator.cc',
     'renderer/mhtml_generator.h',
     'renderer/mouse_lock_dispatcher.cc',
     'renderer/mouse_lock_dispatcher.h',
     'renderer/notification_provider.cc',
     'renderer/notification_provider.h',
     'renderer/paint_aggregator.cc',
     'renderer/paint_aggregator.h',
     'renderer/password_form_conversion_utils.cc',
     'renderer/pepper/content_renderer_pepper_host_factory.cc',
@@ skipping 256 matching lines @@
     }],
   ],
   'target_conditions': [
     ['OS=="android"', {
       'sources/': [
         ['include', '^renderer/render_view_linux\\.cc$'],
       ],
     }],
   ],
 }