Media Related changes for TabCapture API

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 MediaStreamDeviceSettings for permission to
 //    use devices and for which device to use.
@@ skipping 168 matching lines @@
     ~EnumerationCache();
 
     bool valid;
     StreamDeviceInfoArray devices;
   };
 
   // Helpers for signaling the media observer that new capture devices are
   // opened/closed.
   void NotifyObserverDevicesOpened(DeviceRequest* request);
   void NotifyObserverDevicesClosed(DeviceRequest* request);
+  void NotifyObserverRequestStateChange(DeviceRequest* request,
+                                        MediaStreamType media_type);
   void DevicesFromRequest(DeviceRequest* request,
                           content::MediaStreamDevices* devices);
 
   // Helpers.
   bool RequestDone(const MediaStreamManager::DeviceRequest& request) const;
   MediaStreamProvider* GetDeviceManager(MediaStreamType stream_type);
   void StartEnumeration(DeviceRequest* new_request,
                         std::string* label);
   void AddRequest(const DeviceRequest& new_request, std::string* label);
   bool HasEnumerationRequest(MediaStreamType type);
   bool HasEnumerationRequest();
   void ClearEnumerationCache(EnumerationCache* cache);
+  void UpdateRequestState(DeviceRequest* device,
+                          MediaStreamType media_type,
+                          const content::MediaStreamRequest::RequestState);
 
   // Helper to create the device managers, if needed.  Auto-starts the device
   // thread and registers this as a listener with the device managers.
   void EnsureDeviceManagersStarted();
 
   // Sends cached device list to a client corresponding to the request
   // identified by |label|.
   void SendCachedDeviceList(EnumerationCache* cache, const std::string& label);
 
   // Stop the request of enumerating devices indentified by |label|.
@@ skipping 34 matching lines @@
 
   // Static members.
   static bool always_use_fake_devices_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamManager);
 };
 
 }  // namespace media_stream
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_MANAGER_H_