Report if video capturing meets output protection requirement.

content/renderer/media/media_stream_video_capturer_source.h

 // Copyright 2014 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_MEDIA_STREAM_VIDEO_CAPTURER_SOURCE_H_
 #define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_CAPTURER_SOURCE_H_
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "content/common/media/video_capture.h"
+#include "content/public/renderer/render_frame.h"
 #include "content/renderer/media/media_stream_video_source.h"
 
 namespace media {
 class VideoCapturerSource;
 }  // namespace media
 
 namespace content {
 
 // Representation of a video stream coming from a camera, owned by Blink as
 // WebMediaStreamSource. Objects of this class are created and live on main
 // Render thread. Objects can be constructed either by indicating a |device| to
 // look for, or by plugging in a |source| constructed elsewhere.
 class CONTENT_EXPORT MediaStreamVideoCapturerSource
     : public MediaStreamVideoSource {
  public:
   MediaStreamVideoCapturerSource(
       const SourceStoppedCallback& stop_callback,
       std::unique_ptr<media::VideoCapturerSource> source);
   MediaStreamVideoCapturerSource(const SourceStoppedCallback& stop_callback,
-                                 const StreamDeviceInfo& device_info);
+                                 const StreamDeviceInfo& device_info,
+                                 RenderFrame* render_frame);
   ~MediaStreamVideoCapturerSource() override;
 
   // Implements MediaStreamVideoSource.
   void RequestRefreshFrame() override;
 
+  void SetCapturingLinkSecured(bool is_secure) override;
+
  private:
   friend class CanvasCaptureHandlerTest;
   friend class MediaStreamVideoCapturerSourceTest;
 
   // Implements MediaStreamVideoSource.
   void GetCurrentSupportedFormats(
       int max_requested_width,
       int max_requested_height,
       double max_requested_frame_rate,
       const VideoCaptureDeviceFormatsCB& callback) override;
   void StartSourceImpl(
       const media::VideoCaptureFormat& format,
       const blink::WebMediaConstraints& constraints,
       const VideoCaptureDeliverFrameCB& frame_callback) override;
   void StopSourceImpl() override;
 
   // Method to bind as RunningCallback in VideoCapturerSource::StartCapture().
   void OnStarted(bool result);
 
   const char* GetPowerLineFrequencyForTesting() const;
 
   // The source that provides video frames.
   const std::unique_ptr<media::VideoCapturerSource> source_;
 
+  // This is used to send IPC messages to the browser process.
+  RenderFrame* const render_frame_;  // Not owned.

[miu, 2016/05/06 18:56:22]

For safety, instead of having this render_frame_ member, you should have this
class extend content::RenderFrameObserver. That way,
MediaStreamVideoCapturerSource will be notified whenever the RenderFrame is
destroyed.

[xjz, 2016/05/06 22:08:45]

Done.

+
   DISALLOW_COPY_AND_ASSIGN(MediaStreamVideoCapturerSource);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_CAPTURER_SOURCE_H_