Cleanup various WebView/WebFrame APIs to properly handle remote frames.

Source/web/RemoteFrameClient.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef RemoteFrameClient_h
 #define RemoteFrameClient_h
 
 #include "core/frame/FrameClient.h"
 
 namespace blink {
 
 class WebRemoteFrameImpl;
 
 class RemoteFrameClient : public WebCore::FrameClient {
 public:
     explicit RemoteFrameClient(WebRemoteFrameImpl*);
 
+    // FrameClient overrides:
     virtual WebCore::Frame* opener() const OVERRIDE;
     virtual void setOpener(WebCore::Frame*) OVERRIDE;
 
     virtual WebCore::Frame* parent() const OVERRIDE;
     virtual WebCore::Frame* top() const OVERRIDE;
     virtual WebCore::Frame* previousSibling() const OVERRIDE;
     virtual WebCore::Frame* nextSibling() const OVERRIDE;
     virtual WebCore::Frame* firstChild() const OVERRIDE;
     virtual WebCore::Frame* lastChild() const OVERRIDE;
 
+    WebRemoteFrameImpl* webFrame() const { return m_webFrame; }
+
 private:
     WebRemoteFrameImpl* m_webFrame;
 };
 
 } // namespace blink
 
 #endif // RemoteFrameClient_h