[Mojo Video Capture] Split interface BuildableVideoCaptureDevice

content/browser/renderer_host/media/video_capture_device_launch_observer.h

+// Copyright 2017 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 CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_DEVICE_LAUNCH_OBSERVER_H_
+#define CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_DEVICE_LAUNCH_OBSERVER_H_
+
+#include "content/common/content_export.h"
+
+namespace content {
+
+class VideoCaptureController;
+
+class CONTENT_EXPORT VideoCaptureDeviceLaunchObserver {
+ public:
+  virtual ~VideoCaptureDeviceLaunchObserver() {}
+  virtual void OnDeviceLaunched(VideoCaptureController* controller) = 0;
+  virtual void OnDeviceLaunchFailed(VideoCaptureController* controller) = 0;
+  virtual void OnDeviceLaunchAborted() = 0;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_DEVICE_LAUNCH_OBSERVER_H_