Android VideoSource: Add adaptOutputFormat function

webrtc/api/androidvideotracksource.cc

 /*
  *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 210 matching lines @@
     rtc::CritScope lock(&stats_crit_);
     stats_ = rtc::Optional<AndroidVideoTrackSource::Stats>({width, height});
   }
 
   broadcaster_.OnFrame(frame);
 }
 
 void AndroidVideoTrackSource::OnOutputFormatRequest(int width,
                                                     int height,
                                                     int fps) {
-  RTC_DCHECK(camera_thread_checker_.CalledOnValidThread());
-
   cricket::VideoFormat format(width, height,
                               cricket::VideoFormat::FpsToInterval(fps), 0);
   video_adapter_.OnOutputFormatRequest(format);
 }
 
 bool AndroidVideoTrackSource::AdaptFrame(int width,
                                          int height,
                                          int64_t camera_time_us,
                                          int* out_width,
                                          int* out_height,
@@ skipping 18 matching lines @@
     // VideoAdapter dropped the frame.
     return false;
   }
   *crop_x = (width - *crop_width) / 2;
   *crop_y = (height - *crop_height) / 2;
 
   return true;
 }
 
 }  // namespace webrtc