Pass camera facing to WebKit

media/capture/video_capturer_source.h

 // 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.
 
 #ifndef MEDIA_CAPTURE_VIDEO_CAPTURER_SOURCE_H_
 #define MEDIA_CAPTURE_VIDEO_CAPTURER_SOURCE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 96 matching lines @@
   //
   // Note: This should only be called after StartCapture() and before
   // StopCapture(). Otherwise, its behavior is undefined.
   virtual void Resume() {}
 
   // Stops capturing frames and clears all callbacks including the
   // SupportedFormatsCallback callback. Note that queued frame callbacks
   // may still occur after this call, so the caller must take care to
   // use refcounted or weak references in |new_frame_callback|.
   virtual void StopCapture() = 0;
+
+  virtual CameraFacing GetCameraFacing() { return CameraFacing::FRONT; }

[mcasas, 2017/01/05 20:26:37]

This should be s/FRONT/DEFAULT/ or perhaps
/UNKNOWN/, right? Because we don't know at
this point where is the camera pointing to, and
it could be movable like a USB one.

What about making this method const?

[shenghao, 2017/01/06 09:43:01]

Done.

 };
 
 }  // namespace media
 
 #endif  // MEDIA_CAPTURE_VIDEO_CAPTURER_SOURCE_H_