Reland "Add new latency_info for tracking browser composite time."

content/browser/renderer_host/render_widget_host_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_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 
 #include <deque>
 #include <list>
 #include <map>
 #include <queue>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "base/process/kill.h"
 #include "base/strings/string16.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 #include "build/build_config.h"
+#include "cc/base/rolling_time_delta_history.h"
 #include "cc/resources/shared_bitmap.h"
 #include "content/browser/renderer_host/event_with_latency_info.h"
 #include "content/browser/renderer_host/input/input_ack_handler.h"
 #include "content/browser/renderer_host/input/input_router_client.h"
 #include "content/browser/renderer_host/input/synthetic_gesture.h"
 #include "content/browser/renderer_host/input/touch_emulator_client.h"
 #include "content/browser/renderer_host/render_widget_host_latency_tracker.h"
 #include "content/common/input/input_event_ack_state.h"
 #include "content/common/input/synthetic_gesture_packet.h"
 #include "content/common/view_message_enums.h"
@@ skipping 433 matching lines @@
 
   InputRouter* input_router() { return input_router_.get(); }
 
   // Get the BrowserAccessibilityManager for the root of the frame tree,
   BrowserAccessibilityManager* GetRootBrowserAccessibilityManager();
 
   // Get the BrowserAccessibilityManager for the root of the frame tree,
   // or create it if it doesn't already exist.
   BrowserAccessibilityManager* GetOrCreateRootBrowserAccessibilityManager();
 
+  base::TimeDelta GetEstimatedBrowserCompositeTime();
+
 #if defined(OS_WIN)
   gfx::NativeViewAccessible GetParentNativeViewAccessible();
 #endif
 
  protected:
   RenderWidgetHostImpl* AsRenderWidgetHostImpl() override;
 
   // Called when we receive a notification indicating that the renderer
   // process has gone. This will reset our state so that our state will be
   // consistent if a new renderer is created.
@@ skipping 327 matching lines @@
   std::list<HWND> dummy_windows_for_activation_;
 #endif
 
   RenderWidgetHostLatencyTracker latency_tracker_;
 
   int next_browser_snapshot_id_;
   typedef std::map<int,
       base::Callback<void(const unsigned char*, size_t)> > PendingSnapshotMap;
   PendingSnapshotMap pending_browser_snapshots_;
 
+  cc::RollingTimeDeltaHistory browser_composite_latency_history_;
+
   base::WeakPtrFactory<RenderWidgetHostImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_