Changing animate to beginFrame and use struct rather than naked double to allow extension.

Source/web/PageWidgetDelegate.cpp

 /*
  * Copyright (C) 2012 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 39 matching lines @@
 static inline FrameView* mainFrameView(Page* page)
 {
     if (!page)
         return 0;
     // FIXME: Can we remove this check?
     if (!page->mainFrame())
         return 0;
     return page->mainFrame()->view();
 }
 
-void PageWidgetDelegate::animate(Page* page, double monotonicFrameBeginTime)
+void PageWidgetDelegate::animate(Page* page, WebFrameTime frameTime)
 {
     RefPtr<FrameView> view = mainFrameView(page);
     if (!view)
         return;
-    page->autoscrollController().animate(monotonicFrameBeginTime);
-    page->animator().serviceScriptedAnimations(monotonicFrameBeginTime);
+    page->autoscrollController().animate(frameTime);
+    page->animator().serviceScriptedAnimations(frameTime.frameTime());
 }
 
 void PageWidgetDelegate::layout(Page* page)
 {
     if (!page || !page->mainFrame())
         return;
     page->animator().updateLayoutAndStyleForPainting();
 }
 
 void PageWidgetDelegate::paint(Page* page, PageOverlayList* overlays, WebCanvas* canvas, const WebRect& rect, CanvasBackground background)
@@ skipping 125 matching lines @@
 {
     return mainFrame.eventHandler().handleWheelEvent(PlatformWheelEventBuilder(mainFrame.view(), event));
 }
 
 bool PageWidgetEventHandler::handleTouchEvent(LocalFrame& mainFrame, const WebTouchEvent& event)
 {
     return mainFrame.eventHandler().handleTouchEvent(PlatformTouchEventBuilder(mainFrame.view(), event));
 }
 
 }