ui: Cleanup class/struct forward declarations

services/video_capture/device_mock_to_media_adapter.h

Index: services/video_capture/device_mock_to_media_adapter.h
diff --git a/services/video_capture/device_mock_to_media_adapter.h b/services/video_capture/device_mock_to_media_adapter.h
index 28785a2964512a13b49314ff2b67125a5f6b606c..507cc8294ef9603917456d3f464769a49646d689 100644
--- a/services/video_capture/device_mock_to_media_adapter.h
+++ b/services/video_capture/device_mock_to_media_adapter.h
@@ -16,7 +16,7 @@ namespace video_capture {
 // media::VideoCaptureDevice interface.
 class DeviceMockToMediaAdapter : public media::VideoCaptureDevice {
  public:
-  DeviceMockToMediaAdapter(mojom::MockVideoCaptureDevicePtr device);
+  DeviceMockToMediaAdapter(mojom::MockVideoCaptureDevicePtr* device);
   ~DeviceMockToMediaAdapter() override;
 
   // media::VideoCaptureDevice:
@@ -30,7 +30,7 @@ class DeviceMockToMediaAdapter : public media::VideoCaptureDevice {
   void TakePhoto(TakePhotoCallback callback) override;
 
  private:
-  mojom::MockVideoCaptureDevicePtr device_;
+  mojom::MockVideoCaptureDevicePtr* const device_;
 };
 
 }  // namespace video_capture