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

Source/web/WebPopupMenuImpl.cpp

 /*
  * Copyright (C) 2009 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 186 matching lines @@
     }
 
     if (m_rootLayer)
         m_rootLayer->layer()->setBounds(newSize);
 }
 
 void WebPopupMenuImpl::willEndLiveResize()
 {
 }
 
-void WebPopupMenuImpl::animate(double)
+void WebPopupMenuImpl::beginFrame(const WebBeginFrameArgs&)
 {
 }
 
 void WebPopupMenuImpl::layout()
 {
 }
 
 void WebPopupMenuImpl::paintContents(WebCanvas* canvas, const WebRect& rect, bool, WebFloatRect&,
     WebContentLayerClient::GraphicsContextStatus contextStatus)
 {
@@ skipping 195 matching lines @@
     ASSERT(widget == m_widget);
     if (m_widget) {
         m_widget->setClient(0);
         m_widget = 0;
     }
     if (m_client)
         m_client->closeWidgetSoon();
 }
 
 } // namespace blink