support video device enumeration from renderer process.

content/browser/renderer_host/media/media_stream_manager.h

Index: content/browser/renderer_host/media/media_stream_manager.h
===================================================================
--- content/browser/renderer_host/media/media_stream_manager.h	(revision 111389)
+++ content/browser/renderer_host/media/media_stream_manager.h	(working copy)
@@ -68,6 +68,25 @@
   // Closes generated stream.
   void StopGeneratedStream(const std::string& label);
 
+  // Gets a list of video devices.
+  // The request is identified using |label|, which is pointing to an already
+  // created std::string.
+  void EnumerateVideoDevices(MediaStreamRequester* requester,
+                             int render_process_id,
+                             int render_view_id,
+                             const std::string& security_origin,
+                             std::string* label);
+
+  // Open a video device identified by |device_id|.
+  // The request is identified using |label|, which is pointing to an already
+  // created std::string.
+  void OpenVideoDevice(MediaStreamRequester* requester,
+                       int render_process_id,
+                       int render_view_id,
+                       const std::string& device_id,
+                       const std::string& security_origin,
+                       std::string* label);
+
   // Implements MediaStreamProviderListener.
   virtual void Opened(MediaStreamType stream_type,
                       int capture_session_id) OVERRIDE;
@@ -80,8 +99,6 @@
                      MediaStreamProviderError error) OVERRIDE;
 
   // Implements SettingsRequester.
-  virtual void GetDevices(const std::string& label,
-                          MediaStreamType stream_type) OVERRIDE;
   virtual void DevicesAccepted(const std::string& label,
                                const StreamDeviceInfoArray& devices) OVERRIDE;
   virtual void SettingsError(const std::string& label) OVERRIDE;
@@ -97,6 +114,11 @@
   // Helpers.
   bool RequestDone(const MediaStreamManager::DeviceRequest& request) const;
   MediaStreamProvider* GetDeviceManager(MediaStreamType stream_type);
+  void StartEnumeration(DeviceRequest* new_request,
+                        int render_process_id,
+                        int render_view_id,
+                        const std::string& security_origin,
+                        std::string* label);
 
   scoped_ptr<MediaStreamDeviceSettings> device_settings_;
   scoped_ptr<VideoCaptureManager> video_capture_manager_;