[Mojo Video Capture] Add unit tests for ServiceVideoCaptureDeviceLauncher

content/browser/renderer_host/media/service_video_capture_device_launcher.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_SERVICE_VIDEO_CAPTURE_DEVICE_LAUNCHER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_SERVICE_VIDEO_CAPTURE_DEVICE_LAUNCHER_H_
 
 #include "content/browser/renderer_host/media/video_capture_provider.h"
 #include "content/public/common/media_stream_request.h"
 #include "services/video_capture/public/interfaces/device_factory.mojom.h"
 
 namespace content {
 
 // Implementation of VideoCaptureDeviceLauncher that uses the "video_capture"
 // service.
-class ServiceVideoCaptureDeviceLauncher : public VideoCaptureDeviceLauncher {
+class CONTENT_EXPORT ServiceVideoCaptureDeviceLauncher
+    : public VideoCaptureDeviceLauncher {
  public:
   explicit ServiceVideoCaptureDeviceLauncher(
       video_capture::mojom::DeviceFactoryPtr* device_factory);
   ~ServiceVideoCaptureDeviceLauncher() override;
 
   // VideoCaptureDeviceLauncher implementation.
   void LaunchDeviceAsync(const std::string& device_id,
                          MediaStreamType stream_type,
                          const media::VideoCaptureParams& params,
                          base::WeakPtr<media::VideoFrameReceiver> receiver,
                          Callbacks* callbacks,
                          base::OnceClosure done_cb) override;
   void AbortLaunch() override;
 
   void OnUtilizationReport(int frame_feedback_id, double utilization);
 
  private:
   enum class State {
     READY_TO_LAUNCH,
     DEVICE_START_IN_PROGRESS,
     DEVICE_START_ABORTING
   };
 
   void OnCreateDeviceCallback(
       const media::VideoCaptureParams& params,
       video_capture::mojom::DevicePtr device,
       base::WeakPtr<media::VideoFrameReceiver> receiver,
-      Callbacks* callbacks,
-      base::OnceClosure done_cb,
       video_capture::mojom::DeviceAccessResultCode result_code);
 
+  void OnConnectionLostWhileWaitingForCallback();
+
   video_capture::mojom::DeviceFactoryPtr* const device_factory_;
   State state_;
   base::SequenceChecker sequence_checker_;
+  base::OnceClosure done_cb_;
+  Callbacks* callbacks_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_SERVICE_VIDEO_CAPTURE_DEVICE_LAUNCHER_H_