Add latency measurement system

content/renderer/render_widget.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_WIDGET_H_
 #define CONTENT_RENDERER_RENDER_WIDGET_H_
 
 #include <deque>
 #include <map>
 
@@ skipping 14 matching lines @@
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebTextInputInfo.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebWidgetClient.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebRect.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/base/ime/text_input_type.h"
 #include "ui/base/range/range.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/vector2d.h"
 #include "ui/surface/transport_dib.h"
+#include "webkit/compositor_bindings/web_latency_info_impl.h"
 #include "webkit/glue/webcursor.h"
 
 struct ViewHostMsg_UpdateRect_Params;
 class ViewHostMsg_UpdateRect;
 
 namespace IPC {
 class SyncMessage;
 }
 
 namespace WebKit {
@@ skipping 63 matching lines @@
   bool is_hidden() const { return is_hidden_; }
 
   // IPC::Listener
   virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
 
   // IPC::Sender
   virtual bool Send(IPC::Message* msg) OVERRIDE;
 
   // WebKit::WebWidgetClient
   virtual void willBeginCompositorFrame();
+  virtual void didBeginCompositorFrame();
   virtual void didInvalidateRect(const WebKit::WebRect&);
   virtual void didScrollRect(int dx, int dy,
                              const WebKit::WebRect& clipRect);
   virtual void didAutoResize(const WebKit::WebSize& new_size);
   virtual void didActivateCompositor(int input_handler_identifier);
   virtual void didDeactivateCompositor();
   virtual void didBecomeReadyForAdditionalInput();
   virtual void didCommitAndDrawCompositorFrame();
   virtual void didCompleteSwapBuffers();
   virtual void scheduleComposite();
@@ skipping 130 matching lines @@
                         const gfx::Rect& resizer_rect,
                         bool is_fullscreen);
   void OnChangeResizeRect(const gfx::Rect& resizer_rect);
   virtual void OnWasHidden();
   virtual void OnWasShown(bool needs_repainting);
   virtual void OnWasSwappedOut();
   void OnUpdateRectAck();
   void OnCreateVideoAck(int32 video_id);
   void OnUpdateVideoAck(int32 video_id);
   void OnRequestMoveAck();
-  void OnHandleInputEvent(const WebKit::WebInputEvent* event,
+  void OnHandleInputEvent(int64 input_number,
+                          const WebKit::WebInputEvent* event,
                           bool keyboard_shortcut);
+  void OnStartFrame(int64 input_number);
   void OnMouseCaptureLost();
   virtual void OnSetFocus(bool enable);
   void OnSetInputMethodActive(bool is_active);
   virtual void OnImeSetComposition(
       const string16& text,
       const std::vector<WebKit::WebCompositionUnderline>& underlines,
       int selection_start,
       int selection_end);
   virtual void OnImeConfirmComposition(
       const string16& text, const ui::Range& replacement_range);
@@ skipping 154 matching lines @@
   virtual void DidHandleTouchEvent(const WebKit::WebTouchEvent& event) {}
 
   // Check whether the WebWidget has any touch event handlers registered
   // at the given point.
   virtual bool HasTouchEventHandlersAt(const gfx::Point& point) const;
 
   // Should return true if the underlying WebWidget is responsible for
   // the scheduling of compositing requests.
   virtual bool WebWidgetHandlesCompositorScheduling() const;
 
+  // Signal that a new frame is starting, for the purposes of keeping track of
+  // frame latency.
+  void StartingFrame();
+
   // Routing ID that allows us to communicate to the parent browser process
   // RenderWidgetHost. When MSG_ROUTING_NONE, no messages may be sent.
   int32 routing_id_;
 
   int32 surface_id_;
 
   // We are responsible for destroying this object via its Close method.
   WebKit::WebWidget* webwidget_;
 
   // Set to the ID of the view that initiated creating this view, if any. When
@@ skipping 168 matching lines @@
 
   // State associated with the BeginSmoothScroll synthetic scrolling function.
   int next_smooth_scroll_gesture_id_;
   typedef std::map<int, SmoothScrollCompletionCallback>
       PendingSmoothScrollGestureMap;
   PendingSmoothScrollGestureMap pending_smooth_scroll_gestures_;
 
   // Specified whether the compositor will run in its own thread.
   bool is_threaded_compositing_enabled_;
 
+  // Captures information about what input events and frames are currently
+  // being processed.
+  bool started_frame_;
+  bool got_input_;
+
+  WebKit::WebLatencyInfoImpl latency_info_;
+
   DISALLOW_COPY_AND_ASSIGN(RenderWidget);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_WIDGET_H_