1// Copyright 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef CHROME_RENDERER_PRERENDER_PRERENDER_MEDIA_LOAD_DEFERRER_H_
6#define CHROME_RENDERER_PRERENDER_PRERENDER_MEDIA_LOAD_DEFERRER_H_
7
8#include "base/callback.h"
9#include "content/public/renderer/render_frame_observer.h"
10
11namespace prerender {
12
13// Defers media player loading in prerendered pages until the prerendered page
14// is swapped in.
15class PrerenderMediaLoadDeferrer : public content::RenderFrameObserver {
16 public:
17  // Will run |closure| to continue loading the media resource once the page is
18  // swapped in.
19  PrerenderMediaLoadDeferrer(content::RenderFrame* render_frame,
20                             const base::Closure& closure);
21  virtual ~PrerenderMediaLoadDeferrer();
22
23 private:
24  // RenderFrameObserver method:
25  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
26
27  void OnSetIsPrerendering(bool is_prerendering);
28
29  bool is_prerendering_;
30  base::Closure continue_loading_cb_;
31
32  DISALLOW_COPY_AND_ASSIGN(PrerenderMediaLoadDeferrer);
33};
34
35}  // namespace prerender
36
37#endif  // CHROME_RENDERER_PRERENDER_PRERENDER_MEDIA_LOAD_DEFERRER_H_
38