chrome/renderer/prerender/prerender_media_load_deferrer.h

   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_view_observer.h"
  10
  11 namespace prerender {
  12
  13 // Defers media player loading in prerendered pages until the prerendered page
  14 // is swapped in.
  15 class PrerenderMediaLoadDeferrer : public content::RenderViewObserver {
  16  public:
  17   // Will run |closure| to continue loading the media resource once the page is
  18   // swapped in.
  19   PrerenderMediaLoadDeferrer(content::RenderView* render_view,
  20                              const base::Closure& closure);
  21   virtual ~PrerenderMediaLoadDeferrer();
  22
  23  private:
  24   // RenderViewObserver 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_