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

content/browser/renderer_host/media/media_stream_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.
 
 // MediaStreamManager is used to open/enumerate media capture devices (video
 // supported now). Call flow:
 // 1. GenerateStream is called when a render process wants to use a capture
 //    device.
 // 2. MediaStreamManager will ask MediaStreamUIController for permission to
 //    use devices and for which device to use.
@@ skipping 159 matching lines @@
 
   // Finds and returns the device id corresponding to the given
   // |source_id|. Returns true if there was a raw device id that matched the
   // given |source_id|, false if nothing matched it.
   bool TranslateSourceIdToDeviceId(MediaStreamType stream_type,
                                    const ResourceContext::SaltCallback& rc,
                                    const url::Origin& security_origin,
                                    const std::string& source_id,
                                    std::string* device_id) const;
 
+  // Find |device_id| in the list of |requests_|, and returns its session id,
+  // or StreamDeviceInfo::kNoId if not found.
+  int VideoDeviceIdToSessionId(const std::string& device_id) const;
+
   // Called by UI to make sure the device monitor is started so that UI receive
   // notifications about device changes.
   void EnsureDeviceMonitorStarted();
 
   // Implements MediaStreamProviderListener.
   void Opened(MediaStreamType stream_type, int capture_session_id) override;
   void Closed(MediaStreamType stream_type, int capture_session_id) override;
   void DevicesEnumerated(MediaStreamType stream_type,
                          const StreamDeviceInfoArray& devices) override;
   void Aborted(MediaStreamType stream_type, int capture_session_id) override;
@@ skipping 268 matching lines @@
 
   // Objects subscribed to changes in the set of media devices.
   std::vector<MediaStreamRequester*> device_change_subscribers_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_MANAGER_H_