Introduce SelectSettings algorithm for MediaStream video tracks.

content/renderer/media/video_track_adapter.h

Index: content/renderer/media/video_track_adapter.h
diff --git a/content/renderer/media/video_track_adapter.h b/content/renderer/media/video_track_adapter.h
index 340bf86405ab90475643aa484f4fac0082b045dd..63e3f712c3bc9dd559011793e63089f4736722f7 100644
--- a/content/renderer/media/video_track_adapter.h
+++ b/content/renderer/media/video_track_adapter.h
@@ -17,6 +17,20 @@
 
 namespace content {
 
+struct VideoTrackAdapterSettings {
+  VideoTrackAdapterSettings() = default;
+  VideoTrackAdapterSettings(int max_width,
+                            int max_height,
+                            double min_aspect_ratio,
+                            double max_aspect_ratio,
+                            double max_frame_rate);
+  int max_width;
+  int max_height;
+  double min_aspect_ratio;
+  double max_aspect_ratio;
+  double max_frame_rate;
+};
+
 // VideoTrackAdapter is a helper class used by MediaStreamVideoSource used for
 // adapting the video resolution from a source implementation to the resolution
 // a track requires. Different tracks can have different resolution constraints.
@@ -42,10 +56,7 @@ class VideoTrackAdapter
   // passing frames and inform of the result via |on_muted_state_callback|.
   void AddTrack(const MediaStreamVideoTrack* track,
                 VideoCaptureDeliverFrameCB frame_callback,
-                int max_width, int max_height,
-                double min_aspect_ratio,
-                double max_aspect_ratio,
-                double max_frame_rate);
+                const VideoTrackAdapterSettings& settings);
   void RemoveTrack(const MediaStreamVideoTrack* track);
 
   // Delivers |frame| to all tracks that have registered a callback.
@@ -75,13 +86,9 @@ class VideoTrackAdapter
   virtual ~VideoTrackAdapter();
   friend class base::RefCountedThreadSafe<VideoTrackAdapter>;
 
-  void AddTrackOnIO(
-      const MediaStreamVideoTrack* track,
-      VideoCaptureDeliverFrameCB frame_callback,
-      const gfx::Size& max_frame_size,
-      double min_aspect_ratio,
-      double max_aspect_ratio,
-      double max_frame_rate);
+  void AddTrackOnIO(const MediaStreamVideoTrack* track,
+                    VideoCaptureDeliverFrameCB frame_callback,
+                    const VideoTrackAdapterSettings& settings);
   void RemoveTrackOnIO(const MediaStreamVideoTrack* track);
 
   void StartFrameMonitoringOnIO(