Let clients interact with VideoCaptureDeviceClient instead of VideoCaptureDevice

services/video_capture/mock_video_frame_receiver.cc

Index: services/video_capture/mock_video_frame_receiver.cc
diff --git a/services/video_capture/mock_video_frame_receiver.cc b/services/video_capture/mock_video_frame_receiver.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e3c15637253a40d4620dcb44a39cad2eeace5e78
--- /dev/null
+++ b/services/video_capture/mock_video_frame_receiver.cc
@@ -0,0 +1,20 @@
+// Copyright 2016 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.
+
+#include "services/video_capture/mock_video_frame_receiver.h"
+
+namespace video_capture {
+
+MockVideoFrameReceiver::MockVideoFrameReceiver(
+    mojom::VideoFrameReceiverRequest request)
+    : binding_(this, std::move(request)) {}
+
+MockVideoFrameReceiver::~MockVideoFrameReceiver() = default;
+
+void MockVideoFrameReceiver::OnIncomingCapturedVideoFrame(
+    media::mojom::VideoFramePtr frame) {
+  OnIncomingCapturedVideoFramePtr(&frame);
+}
+
+}  // namespace video_capture