Add GetPreferredFormats method to media::VideoCapturerSource.

media/capture/video_capturer_source.cc

 // Copyright 2015 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 "media/capture/video_capturer_source.h"
 
 namespace media {
 
 // TODO(mcasas): VideoCapturerSource is implemented in other .dll(s) (e.g.
 // content) in Windows component build. The current compiler fails to generate
 // object files for this destructor if it's defined in the header file and that
 // breaks linking. Consider removing this file when the compiler+linker is able
 // to generate symbols across linking units.
 VideoCapturerSource::~VideoCapturerSource() {}
 
+void VideoCapturerSource::GetCurrentSupportedFormats(
+    int max_requested_width,
+    int max_requested_height,
+    double max_requested_frame_rate,
+    const VideoCaptureDeviceFormatsCB& callback) {
+  callback.Run(GetPreferredFormats());
+}
+
 }  // namespace media