Add GetPreferredFormats method to media::VideoCapturerSource.

content/renderer/media/media_stream_video_capturer_source.cc

 // 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.
 
 #include "content/renderer/media/media_stream_video_capturer_source.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
@@ skipping 191 matching lines @@
  public:
   explicit LocalVideoCapturerSource(const StreamDeviceInfo& device_info);
   ~LocalVideoCapturerSource() override;
 
   // VideoCaptureDelegate Implementation.
   void GetCurrentSupportedFormats(
       int max_requested_width,
       int max_requested_height,
       double max_requested_frame_rate,
       const VideoCaptureDeviceFormatsCB& callback) override;
+  media::VideoCaptureFormats GetPreferredFormats() override;
   void StartCapture(const media::VideoCaptureParams& params,
                     const VideoCaptureDeliverFrameCB& new_frame_callback,
                     const RunningCallback& running_callback) override;
   void RequestRefreshFrame() override;
   void MaybeSuspend() override;
   void Resume() override;
   void StopCapture() override;
 
  private:
   void OnStateUpdate(VideoCaptureState state);
@@ skipping 72 matching lines @@
   }
 
   DCHECK(formats_enumerated_callback_.is_null());
   formats_enumerated_callback_ = callback;
   manager_->GetDeviceFormatsInUse(
       session_id_, media::BindToCurrentLoop(base::Bind(
                        &LocalVideoCapturerSource::OnDeviceFormatsInUseReceived,
                        weak_factory_.GetWeakPtr())));
 }
 
+media::VideoCaptureFormats LocalVideoCapturerSource::GetPreferredFormats() {
+  return media::VideoCaptureFormats();
+}
+
 void LocalVideoCapturerSource::StartCapture(
     const media::VideoCaptureParams& params,
     const VideoCaptureDeliverFrameCB& new_frame_callback,
     const RunningCallback& running_callback) {
   DCHECK(params.requested_format.IsValid());
   DCHECK(thread_checker_.CalledOnValidThread());
   running_callback_ = running_callback;
 
   stop_capture_cb_ = manager_->StartCapture(
       session_id_, params, media::BindToCurrentLoop(base::Bind(
@@ skipping 188 matching lines @@
     StopSource();
   }
 }
 
 const char*
 MediaStreamVideoCapturerSource::GetPowerLineFrequencyForTesting() const {
   return kPowerLineFrequency;
 }
 
 }  // namespace content