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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef CHROME_RENDERER_PRERENDER_PRERENDER_HELPER_H_ | 5 #ifndef CHROME_RENDERER_PRERENDER_PRERENDER_HELPER_H_ |
6 #define CHROME_RENDERER_PRERENDER_PRERENDER_HELPER_H_ | 6 #define CHROME_RENDERER_PRERENDER_PRERENDER_HELPER_H_ |
7 | 7 |
8 #include "base/compiler_specific.h" | 8 #include "base/compiler_specific.h" |
9 #include "base/time/time.h" | 9 #include "base/time/time.h" |
10 #include "content/public/renderer/render_frame_observer.h" | 10 #include "content/public/renderer/render_frame_observer.h" |
11 #include "content/public/renderer/render_frame_observer_tracker.h" | 11 #include "content/public/renderer/render_frame_observer_tracker.h" |
12 | 12 |
13 namespace prerender { | 13 namespace prerender { |
14 | 14 |
15 // Helper class to track whether its RenderFrame is currently being prerendered. | 15 // Helper class to track whether its RenderFrame is currently being prerendered. |
16 // Created when prerendering starts and deleted as soon as it stops. | 16 // Created when prerendering starts and deleted as soon as it stops. |
17 class PrerenderHelper | 17 class PrerenderHelper |
18 : public content::RenderFrameObserver, | 18 : public content::RenderFrameObserver, |
19 public content::RenderFrameObserverTracker<PrerenderHelper> { | 19 public content::RenderFrameObserverTracker<PrerenderHelper> { |
20 public: | 20 public: |
21 explicit PrerenderHelper(content::RenderFrame* render_frame); | 21 explicit PrerenderHelper(content::RenderFrame* render_frame); |
22 virtual ~PrerenderHelper(); | 22 virtual ~PrerenderHelper(); |
23 | 23 |
24 // Returns true if |render_view| is currently prerendering. | 24 // Returns true if |render_view| is currently prerendering. |
25 static bool IsPrerendering(const content::RenderFrame* render_frame); | 25 static bool IsPrerendering(const content::RenderFrame* render_frame); |
26 | 26 |
27 private: | 27 private: |
28 // RenderViewObserver implementation | 28 // RenderViewObserver implementation |
29 virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE; | 29 virtual bool OnMessageReceived(const IPC::Message& message) override; |
30 | 30 |
31 void OnSetIsPrerendering(bool is_prerendering); | 31 void OnSetIsPrerendering(bool is_prerendering); |
32 | 32 |
33 DISALLOW_COPY_AND_ASSIGN(PrerenderHelper); | 33 DISALLOW_COPY_AND_ASSIGN(PrerenderHelper); |
34 }; | 34 }; |
35 | 35 |
36 } // namespace prerender | 36 } // namespace prerender |
37 | 37 |
38 #endif // CHROME_RENDERER_PRERENDER_PRERENDER_HELPER_H_ | 38 #endif // CHROME_RENDERER_PRERENDER_PRERENDER_HELPER_H_ |
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