Remove deprecated QTKit Video Capture Support

media/capture/video/mac/video_capture_device_factory_mac.h

Index: media/capture/video/mac/video_capture_device_factory_mac.h
diff --git a/media/capture/video/mac/video_capture_device_factory_mac.h b/media/capture/video/mac/video_capture_device_factory_mac.h
index f5649b9ce8a83557631148851f123e2818e6a1f7..3be9226985b72f72ff89153570d08ff26b10954b 100644
--- a/media/capture/video/mac/video_capture_device_factory_mac.h
+++ b/media/capture/video/mac/video_capture_device_factory_mac.h
@@ -16,8 +16,7 @@ namespace media {
 class MEDIA_EXPORT VideoCaptureDeviceFactoryMac
     : public VideoCaptureDeviceFactory {
  public:
-  explicit VideoCaptureDeviceFactoryMac(
-      scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner);
+  VideoCaptureDeviceFactoryMac();
   ~VideoCaptureDeviceFactoryMac() override;
 
   scoped_ptr<VideoCaptureDevice> Create(
@@ -30,9 +29,6 @@ class MEDIA_EXPORT VideoCaptureDeviceFactoryMac
       VideoCaptureFormats* supported_formats) override;
 
  private:
-  // Cache of |ui_task_runner| for enumerating devices there for QTKit.
-  scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner_;
-
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureDeviceFactoryMac);
 };