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

content/renderer/media/video_capture_impl_manager.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_MEDIA_VIDEO_CAPTURE_IMPL_MANAGER_H_
 #define CONTENT_RENDERER_MEDIA_VIDEO_CAPTURE_IMPL_MANAGER_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 72 matching lines @@
   // Get supported formats supported by the device for the given session
   // ID. |callback| will be called on the IO thread.
   void GetDeviceSupportedFormats(media::VideoCaptureSessionId id,
                                  const VideoCaptureDeviceFormatsCB& callback);
 
   // Get supported formats currently in use for the given session ID.
   // |callback| will be called on the IO thread.
   void GetDeviceFormatsInUse(media::VideoCaptureSessionId id,
                              const VideoCaptureDeviceFormatsCB& callback);
 
-  // Make all existing VideoCaptureImpl instances stop/resume delivering
-  // video frames to their clients, depends on flag |suspend|. This is called in
-  // response to a RenderView-wide PageHidden/Shown() event. To suspend/resume
-  // an individual session, please call Suspend(id) or Resume(id).
-  void SuspendDevices(bool suspend);
-
   virtual std::unique_ptr<VideoCaptureImpl> CreateVideoCaptureImplForTesting(
       media::VideoCaptureSessionId session_id) const;
 
  private:
   // Holds bookkeeping info for each VideoCaptureImpl shared by clients.
   struct DeviceEntry;
 
   void StopCapture(int client_id, media::VideoCaptureSessionId id);
   void UnrefDevice(media::VideoCaptureSessionId id);
 
   // Devices currently in use.
   std::vector<DeviceEntry> devices_;
 
   // This is an internal ID for identifying clients of VideoCaptureImpl.
   // The ID is global for the render process.
   int next_client_id_;
 
   // Hold a pointer to the Render Main message loop to check we operate on the
   // right thread.
   const scoped_refptr<base::SingleThreadTaskRunner> render_main_task_runner_;
 
-  // Set to true if SuspendDevices(true) was called. This, along with
-  // DeviceEntry::is_individually_suspended, is used to determine whether to
-  // take action when suspending/resuming each device.
-  bool is_suspending_all_;
-
   // Bound to the render thread.
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<VideoCaptureImplManager> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureImplManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_VIDEO_CAPTURE_IMPL_MANAGER_H_