[Mojo Video Capture] Implement a VideoCaptureProvider using the Mojo service (part 1)

content/browser/renderer_host/media/service_launched_video_capture_device.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_LAUNCHED_VIDEO_CAPTURE_DEVICE_H_
+#define CONTENT_BROWSER_RENDERER_HOST_MEDIA_SERVICE_LAUNCHED_VIDEO_CAPTURE_DEVICE_H_
+
+#include "content/browser/renderer_host/media/video_capture_provider.h"
+#include "services/video_capture/public/interfaces/device.mojom.h"
+
+namespace content {
+
+// Implementation of LaunchedVideoCaptureDevice that uses the "video_capture"
+// service.
+class ServiceLaunchedVideoCaptureDevice : public LaunchedVideoCaptureDevice {
+ public:
+  ServiceLaunchedVideoCaptureDevice(video_capture::mojom::DevicePtr device);
+  ~ServiceLaunchedVideoCaptureDevice() override;
+
+  // LaunchedVideoCaptureDevice implementation.
+  void GetPhotoCapabilities(
+      media::VideoCaptureDevice::GetPhotoCapabilitiesCallback callback)
+      const override;
+  void SetPhotoOptions(
+      media::mojom::PhotoSettingsPtr settings,
+      media::VideoCaptureDevice::SetPhotoOptionsCallback callback) override;
+  void TakePhoto(
+      media::VideoCaptureDevice::TakePhotoCallback callback) override;
+  void MaybeSuspendDevice() override;
+  void ResumeDevice() override;
+  void RequestRefreshFrame() override;
+
+  void SetDesktopCaptureWindowIdAsync(gfx::NativeViewId window_id,
+                                      base::OnceClosure done_cb) override;
+
+  void OnUtilizationReport(int frame_feedback_id, double utilization) override;
+
+ private:
+  video_capture::mojom::DevicePtr device_;

[mcasas, 2017/05/03 19:10:23]

This can probably be const (since is passed on ctor and
none of the methods seem to destroy it, right?)

[chfremer, 2017/05/03 21:29:36]

You are correct that, in this CL, it can be const.
However, this is only because |device_| is not yet being used.
In CL24_part2, I will have to remove the const again.

Done.

+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_SERVICE_LAUNCHED_VIDEO_CAPTURE_DEVICE_H_