Android: not to pause screen capture when Chrome is put to background

content/renderer/render_view_impl.h

 // Copyright (c) 2012 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_RENDERER_RENDER_VIEW_IMPL_H_
 #define CONTENT_RENDERER_RENDER_VIEW_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 564 matching lines @@
 
   // Misc private functions ----------------------------------------------------
   // Check whether the preferred size has changed.
   void CheckPreferredSize();
 
 #if defined(OS_ANDROID)
   // Launch an Android content intent with the given URL.
   void LaunchAndroidContentIntent(const GURL& intent_url,
                                   size_t request_id,
                                   bool is_main_frame);
+  // Make the video capture devices(e.g. webcam) stop/resume delivering video
+  // frames to their clients, depending on flag |suspend|. This is called in
+  // response to a RenderView PageHidden/Shown().
+  void SuspendVideoCaptureDevices(bool suspend);
 #endif
 
 #if defined(OS_WIN) || (defined(OS_POSIX) && !defined(OS_MACOSX))
   void UpdateFontRenderingFromRendererPrefs();
 #else
   void UpdateFontRenderingFromRendererPrefs() {}
 #endif
 
   // In OOPIF-enabled modes, this tells each RenderFrame with a pending state
   // update to inform the browser process.
@@ skipping 241 matching lines @@
   // ---------------------------------------------------------------------------
 
   base::WeakPtrFactory<RenderViewImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_VIEW_IMPL_H_