Update Memory.RendererUsed only after Blink is initialized

content/renderer/render_thread_impl.h

 // 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.
 
 #ifndef CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
 #define CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 71 matching lines @@
 class DBMessageFilter;
 class DevToolsAgentFilter;
 class DomStorageDispatcher;
 class EmbeddedWorkerDispatcher;
 class GamepadSharedMemoryReader;
 class GpuChannelHost;
 class IndexedDBDispatcher;
 class InputEventFilter;
 class InputHandlerManager;
 class MediaStreamCenter;
+class MemoryObserver;
 class PeerConnectionDependencyFactory;
 class MidiMessageFilter;
 class NetInfoDispatcher;
 class P2PSocketDispatcher;
 class PeerConnectionTracker;
 class RendererDemuxerAndroid;
 class RendererWebKitPlatformSupportImpl;
 class RenderProcessObserver;
 class VideoCaptureImplManager;
 class WebGraphicsContext3DCommandBufferImpl;
@@ skipping 458 matching lines @@
 
   scoped_ptr<WebRTCIdentityService> webrtc_identity_service_;
 
   scoped_ptr<GamepadSharedMemoryReader> gamepad_shared_memory_reader_;
 
   // TODO(reveman): Allow AllocateGpuMemoryBuffer to be called from
   // multiple threads. Current allocation mechanism for IOSurface
   // backed GpuMemoryBuffers prevent this. crbug.com/325045
   base::ThreadChecker allocate_gpu_memory_buffer_thread_checker_;
 
+  scoped_ptr<MemoryObserver> memory_observer_;
+
   // Compositor settings
   bool is_gpu_rasterization_enabled_;
   bool is_gpu_rasterization_forced_;
   bool is_impl_side_painting_enabled_;
   bool is_low_res_tiling_enabled_;
   bool is_lcd_text_enabled_;
   bool is_distance_field_text_enabled_;
   bool is_zero_copy_enabled_;
   bool is_one_copy_enabled_;
 
   std::map<int, mojo::MessagePipeHandle> pending_render_frame_connects_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderThreadImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_THREAD_IMPL_H_