Make the renderer-side prerendering code use RenderFrames instead of RenderViews.

chrome/renderer/chrome_render_frame_observer.h

+// Copyright 2013 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 CHROME_RENDERER_CHROME_RENDER_FRAME_OBSERVER_H_
+#define CHROME_RENDERER_CHROME_RENDER_FRAME_OBSERVER_H_
+
+#include "content/public/renderer/render_frame_observer.h"
+
+// This class holds the Chrome specific parts of RenderFrame, and has the same
+// lifetime.
+class ChromeRenderFrameObserver : public content::RenderFrameObserver {
+ public:
+  explicit ChromeRenderFrameObserver(content::RenderFrame* render_frame);
+  virtual ~ChromeRenderFrameObserver();
+
+ private:
+  // RenderFrameObserver implementation.
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+
+  // IPC handlers
+  void OnSetIsPrerendering(bool is_prerendering);
+
+  DISALLOW_COPY_AND_ASSIGN(ChromeRenderFrameObserver);
+};
+
+#endif  // CHROME_RENDERER_CHROME_RENDER_FRAME_OBSERVER_H_