Add input latency histograms for wheel events

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 419 matching lines @@
   // Called by RenderWidgetHostView in response to OnSetNeedsFlushInput.
   void FlushInput();
 
   // InputRouterClient
   void SetNeedsFlush() override;
 
   // Indicates whether the renderer drives the RenderWidgetHosts's size or the
   // other way around.
   bool should_auto_resize() { return should_auto_resize_; }
 
-  void ComputeTouchLatency(const ui::LatencyInfo& latency_info);
   void FrameSwapped(const ui::LatencyInfo& latency_info);
   void DidReceiveRendererFrame();
 
   // Returns the ID that uniquely describes this component to the latency
   // subsystem.
   int64 GetLatencyComponentId();
 
   static void CompositorFrameDrawn(
       const std::vector<ui::LatencyInfo>& latency_info);
 
@@ skipping 25 matching lines @@
 #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 CreateRWHLatencyInfoIfNotExist(
+  ui::LatencyInfo CreateInputEventLatencyInfoIfNotExist(
       const ui::LatencyInfo* original,
       blink::WebInputEvent::Type type,
       const ui::LatencyInfo::InputCoordinate* logical_coordinates,
       size_t logical_coordinates_size);
+  void CreateInputAckLatencyInfoAndHistogram(
+      const std::string& event_type_name,
+      ui::LatencyInfo* latency_info);
 
   // 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;
 
@@ skipping 341 matching lines @@
   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_