Let getSettings() return the constrained track resolution, not source.

content/renderer/media/media_stream_video_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_source.h"
 
 #include <algorithm>
 #include <limits>
 #include <string>
 
@@ skipping 564 matching lines @@
                                      &max_aspect_ratio);
       double max_frame_rate = 0.0f;
       // Note: Optional and ideal constraints are ignored; this is
       // purely a hard max limit.
       if (track.constraints.basic().frameRate.hasMax())
         max_frame_rate = track.constraints.basic().frameRate.max();
 
       track_adapter_->AddTrack(track.track, track.frame_callback, max_width,
                                max_height, min_aspect_ratio, max_aspect_ratio,
                                max_frame_rate);
+      // Calculate resulting frame size if the source delivers frames
+      // according to the current format. Note: Format may change later.
+      gfx::Size desired_size;
+      VideoTrackAdapter::CalculateTargetSize(
+          current_format_.frame_size, gfx::Size(max_width, max_height),
+          min_aspect_ratio, max_aspect_ratio, &desired_size);
+      track.track->SetTargetSize(desired_size.width(), desired_size.height());
     }
 
     DVLOG(3) << "FinalizeAddTrack() result " << result;
 
     if (!track.callback.is_null())
       track.callback.Run(this, result,
                          blink::WebString::fromUTF8(unsatisfied_constraint));
   }
 }
 
@@ skipping 28 matching lines @@
       callback(callback) {
 }
 
 MediaStreamVideoSource::TrackDescriptor::TrackDescriptor(
     const TrackDescriptor& other) = default;
 
 MediaStreamVideoSource::TrackDescriptor::~TrackDescriptor() {
 }
 
 }  // namespace content