Factor out latency tracking from RenderWidgetHostImpl

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>
@@ skipping 11 matching lines @@
 #include "base/strings/string16.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 #include "build/build_config.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"
 #include "content/public/browser/readback_types.h"
 #include "content/public/browser/render_widget_host.h"
 #include "content/public/common/page_zoom.h"
 #include "ipc/ipc_listener.h"
 #include "ui/base/ime/text_input_mode.h"
 #include "ui/base/ime/text_input_type.h"
 #include "ui/events/latency_info.h"
@@ skipping 417 matching lines @@
 
   // Don't check whether we expected a resize ack during layout tests.
   static void DisableResizeAckCheckForTesting();
 
   void WindowSnapshotAsyncCallback(
       int routing_id,
       int snapshot_id,
       gfx::Size snapshot_size,
       scoped_refptr<base::RefCountedBytes> png_data);
 
-  // LatencyComponents generated in the renderer must have component IDs
-  // provided to them by the browser process. This function adds the correct
-  // component ID where necessary.
-  void AddLatencyInfoComponentIds(ui::LatencyInfo* latency_info);
-
   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();
 
 #if defined(OS_WIN)
   gfx::NativeViewAccessible GetParentNativeViewAccessible();
 #endif
 
  protected:
   RenderWidgetHostImpl* AsRenderWidgetHostImpl() override;
 
-  // Create a LatencyInfo struct with INPUT_EVENT_LATENCY_RWH_COMPONENT
-  // component if it is not already in |original|. And if |original| is
-  // not NULL, it is also merged into the resulting LatencyInfo.
-  ui::LatencyInfo CreateInputEventLatencyInfoIfNotExist(
-      const ui::LatencyInfo* original,
-      blink::WebInputEvent::Type type,
-      const ui::LatencyInfo::InputCoordinate* logical_coordinates,
-      size_t logical_coordinates_size);
-  // Add UMA histograms for the latency to the renderer and roundtrip latency
-  // for a given event type.
-  void ComputeInputLatencyHistograms(
-      blink::WebInputEvent::Type type,
-      const ui::LatencyInfo& latency_info) const;
-
   // 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.
   void RendererExited(base::TerminationStatus status, int exit_code);
 
   // Retrieves an id the renderer can use to refer to its view.
   // This is used for various IPC messages, including plugins.
   gfx::NativeViewId GetNativeViewId() const;
 
   // Retrieves an id for the surface that the renderer can draw to
@@ skipping 158 matching lines @@
   void OnKeyboardEventAck(const NativeWebKeyboardEvent& event,
                           InputEventAckState ack_result) override;
   void OnWheelEventAck(const MouseWheelEventWithLatencyInfo& event,
                        InputEventAckState ack_result) override;
   void OnTouchEventAck(const TouchEventWithLatencyInfo& event,
                        InputEventAckState ack_result) override;
   void OnGestureEventAck(const GestureEventWithLatencyInfo& event,
                          InputEventAckState ack_result) override;
   void OnUnexpectedEventAck(UnexpectedEventAckType type) override;
 
+  void StartTrackingInputEventLatency(const blink::WebInputEvent& event,
+                                      ui::LatencyInfo* latency);
+
   void OnSyntheticGestureCompleted(SyntheticGesture::Result result);
 
   // Called when there is a new auto resize (using a post to avoid a stack
   // which may get in recursive loops).
   void DelayedAutoResized();
 
   void WindowOldSnapshotReachedScreen(int snapshot_id);
 
   void WindowSnapshotReachedScreen(int snapshot_id);
 
@@ skipping 141 matching lines @@
 
   // Receives and handles all input events.
   scoped_ptr<InputRouter> input_router_;
 
   scoped_ptr<TimeoutMonitor> hang_monitor_timeout_;
 
 #if defined(OS_WIN)
   std::list<HWND> dummy_windows_for_activation_;
 #endif
 
-  int64 last_input_number_;
+  RenderWidgetHostLatencyTracker latency_tracker_;
 
   bool subscribe_uniform_enabled_;
 
   int next_browser_snapshot_id_;
   typedef std::map<int,
       base::Callback<void(const unsigned char*, size_t)> > PendingSnapshotMap;
   PendingSnapshotMap pending_browser_snapshots_;
 
   base::WeakPtrFactory<RenderWidgetHostImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_