Have ElementRareData::ensure*() methods return references

Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 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 2137 matching lines @@
 {
     if (!m_imeAcceptEvents)
         return 0;
 
     LocalFrame* focusedFrame = focusedWebCoreFrame();
     if (!focusedFrame)
         return 0;
 
     Element* target = focusedFrame->document()->focusedElement();
     if (target && target->hasInputMethodContext())
-        return target->inputMethodContext();
+        return &target->inputMethodContext();
 
     return 0;
 }
 
 WebPlugin* WebViewImpl::focusedPluginIfInputMethodSupported(LocalFrame* frame)
 {
     WebPluginContainerImpl* container = WebFrameImpl::pluginContainerFromNode(frame, WebNode(focusedElement()));
     if (container && container->supportsInputMethod())
         return container->plugin();
     return 0;
@@ skipping 1805 matching lines @@
     const PageScaleConstraints& constraints = m_pageScaleConstraintsSet.pageDefinedConstraints();
 
     if (!mainFrameImpl() || !mainFrameImpl()->frameView())
         return false;
 
     return mainFrameImpl()->frameView()->layoutSize().width() == m_size.width
         || (constraints.minimumScale == constraints.maximumScale && constraints.minimumScale != -1);
 }
 
 } // namespace blink