Create RenderFrame/RenderFrameHost for the main frame of a page.

content/public/browser/render_frame_host.h

Index: content/public/browser/render_frame_host.h
diff --git a/content/public/browser/render_frame_host.h b/content/public/browser/render_frame_host.h
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+++ b/content/public/browser/render_frame_host.h
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+// Copyright (c) 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 CONTENT_PUBLIC_BROWSER_RENDER_FRAME_HOST_H_
+#define CONTENT_PUBLIC_BROWSER_RENDER_FRAME_HOST_H_
+
+#include "content/common/content_export.h"
+#include "ipc/ipc_listener.h"
+#include "ipc/ipc_sender.h"
+
+namespace content {
+
+// The interface provides a communication conduit with a frame in the renderer.
+class CONTENT_EXPORT RenderFrameHost : public IPC::Listener,
+                                       public IPC::Sender {
+ private:
+  // This interface should only be implemented inside content.
+  friend class RenderFrameHostImpl;
+  RenderFrameHost() {}
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_RENDER_FRAME_HOST_H_