Media Stream Image Capture (4): wire takePhoto and implement in FakeVCDevice

content/browser/renderer_host/media/video_capture_manager.h

 // Copyright (c) 2012 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.
 
 // VideoCaptureManager is used to open/close, start/stop, enumerate available
 // video capture devices, and manage VideoCaptureController's.
 // All functions are expected to be called from Browser::IO thread. Some helper
 // functions (*OnDeviceThread) will dispatch operations to the device thread.
 // VideoCaptureManager will open OS dependent instances of VideoCaptureDevice.
 // A device can only be opened once.
@@ skipping 138 matching lines @@
       const scoped_refptr<base::SingleThreadTaskRunner>& device_task_runner) {
     device_task_runner_ = device_task_runner;
   }
 #endif
 
   // Returns the SingleThreadTaskRunner where devices are enumerated on and
   // started.
   scoped_refptr<base::SingleThreadTaskRunner>& device_task_runner() {
     return device_task_runner_;
   }
+
+  bool TakePhoto(
+      int session_id,

[miu, 2016/05/04 23:45:50]

Following up on my comment above, can this take a device_id instead of a
session_id?

[mcasas, 2016/05/05 00:57:12]

See above: unfortunately, |device_id| is a different thing for 
MSM and for VCM.

+      const media::VideoCaptureDevice::TakePhotoCallback& photo_callback);
+
  private:
   ~VideoCaptureManager() override;
   class DeviceEntry;
 
   // Checks to see if |entry| has no clients left on its controller. If so,
   // remove it from the list of devices, and delete it asynchronously. |entry|
   // may be freed by this function.
   void DestroyDeviceEntryIfNoClients(DeviceEntry* entry);
 
   // Helpers to report an event to our Listener.
@@ skipping 214 matching lines @@
   // Map used by DesktopCapture.
   std::map<media::VideoCaptureSessionId, gfx::NativeViewId>
       notification_window_ids_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_MANAGER_H_