Don't convert invalidations to a FloatRect.

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 354 matching lines @@
 //-----------------------------------------------------------------------------
 // HostWindow
 
 void WebPopupMenuImpl::invalidateContentsAndRootView(const IntRect& paintRect)
 {
     if (paintRect.isEmpty())
         return;
     if (m_client)
         m_client->didInvalidateRect(paintRect);
     if (m_rootLayer)
-        m_rootLayer->layer()->invalidateRect(FloatRect(paintRect));
+        m_rootLayer->layer()->invalidateRect(paintRect);
 }
 
 void WebPopupMenuImpl::invalidateContentsForSlowScroll(const IntRect& updateRect)
 {
     invalidateContentsAndRootView(updateRect);
 }
 
 void WebPopupMenuImpl::scheduleAnimation()
 {
 }
@@ skipping 14 matching lines @@
     ASSERT(widget == m_widget);
     if (m_widget) {
         m_widget->setClient(0);
         m_widget = 0;
     }
     if (m_client)
         m_client->closeWidgetSoon();
 }
 
 } // namespace blink