Include timestamp with vsync-delineating input events

Source/WebKit/chromium/src/WebCompositorInputHandlerImpl.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 94 matching lines @@
         m_client->didHandleInputEvent();
         break;
     case DidNotHandle:
         m_client->didNotHandleInputEvent(true /* sendToWidget */);
         break;
     case DropEvent:
         m_client->didNotHandleInputEvent(false /* sendToWidget */);
         break;
     }
     if (event.modifiers & WebInputEvent::IsLastInputEventForCurrentVSync)
-        m_inputHandlerClient->didReceiveLastInputEventForVSync();
+        m_inputHandlerClient->didReceiveLastInputEventForVSync(event.timeStampSeconds);
 }
 
 WebCompositorInputHandlerImpl::EventDisposition WebCompositorInputHandlerImpl::handleInputEventInternal(const WebInputEvent& event)
 {
     if (event.type == WebInputEvent::MouseWheel) {
         const WebMouseWheelEvent& wheelEvent = *static_cast<const WebMouseWheelEvent*>(&event);
         WebInputHandlerClient::ScrollStatus scrollStatus = m_inputHandlerClient->scrollBegin(WebPoint(wheelEvent.x, wheelEvent.y), WebInputHandlerClient::ScrollInputTypeWheel);
         switch (scrollStatus) {
         case WebInputHandlerClient::ScrollStatusStarted: {
             TRACE_EVENT_INSTANT2("webkit", "WebCompositorInputHandlerImpl::handleInput wheel scroll", "deltaX", -wheelEvent.deltaX, "deltaY", -wheelEvent.deltaY);
@@ skipping 234 matching lines @@
         m_flingParameters.cumulativeScroll.height += increment.height;
     }
 }
 
 void WebCompositorInputHandlerImpl::mainThreadHasStoppedFlinging()
 {
     m_flingActiveOnMainThread =  false;
 }
 
 }