Mac AVFoundation: Allow use of all camera's supported resolutions.

media/video/capture/mac/video_capture_device_mac.mm

Index: media/video/capture/mac/video_capture_device_mac.mm
diff --git a/media/video/capture/mac/video_capture_device_mac.mm b/media/video/capture/mac/video_capture_device_mac.mm
index 1a65e990910aac11cf50c43983ec3d117ac30bf8..56bcefa611cd25684f66e2d313af5f9096e01a0d 100644
--- a/media/video/capture/mac/video_capture_device_mac.mm
+++ b/media/video/capture/mac/video_capture_device_mac.mm
@@ -189,7 +189,8 @@ void VideoCaptureDeviceMac::AllocateAndStart(
   // QTKit API can scale captured frame to any size requested, which would lead
   // to undesired aspect ratio changes. Try to open the camera with a known
   // supported format and let the client crop/pad the captured frames.
-  GetBestMatchSupportedResolution(&width, &height);
+  if (!AVFoundationGlue::IsAVFoundationSupported())
+    GetBestMatchSupportedResolution(&width, &height);
 
   client_ = client.Pass();
   NSString* deviceId =