Split avfoundationcapturer classes in separate files.

webrtc/sdk/objc/Framework/Classes/avfoundationvideocapturer.h

Index: webrtc/sdk/objc/Framework/Classes/avfoundationvideocapturer.h
diff --git a/webrtc/sdk/objc/Framework/Classes/avfoundationvideocapturer.h b/webrtc/sdk/objc/Framework/Classes/avfoundationvideocapturer.h
index ebabb8ce20d7e2202b73eca3e20e03d487324485..9a6a473b497f03cd03229e22266756a96c83eb77 100644
--- a/webrtc/sdk/objc/Framework/Classes/avfoundationvideocapturer.h
+++ b/webrtc/sdk/objc/Framework/Classes/avfoundationvideocapturer.h
@@ -58,6 +58,13 @@ class AVFoundationVideoCapturer : public cricket::VideoCapturer {
   void CaptureSampleBuffer(CMSampleBufferRef sample_buffer,
                            webrtc::VideoRotation rotation);
 
+  // Sets device format for the provided capture device. Returns true/false
+  // depending

[magjed_webrtc, 2016/11/14 13:48:52]

This function should be static. On a second look, it looks like it would be
better to move this function into RTCAVFoundationVideoCapturerInternal like:
- (void)setFormat:(cricket::VideoFormat format)format;
and call that function from AVFoundationVideoCapturer::Start.

+  // on success.
+  bool SetFormatForCaptureDevice(AVCaptureDevice* device,
+                                 AVCaptureSession* session,
+                                 const cricket::VideoFormat& format);
+
  private:
   RTCAVFoundationVideoCapturerInternal *_capturer;
   webrtc::I420BufferPool _buffer_pool;