support video device enumeration from renderer process.

content/browser/renderer_host/media/media_stream_dispatcher_host.h

 // Copyright (c) 2011 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_MEDIA_STREAM_DISPATCHER_HOST_H_
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_DISPATCHER_HOST_H_
 
 #include <map>
 #include <string>
 #include <utility>
@@ skipping 19 matching lines @@
  public:
   MediaStreamDispatcherHost(const content::ResourceContext* resource_context,
                             int render_process_id);
   virtual ~MediaStreamDispatcherHost();
 
   // MediaStreamRequester implementation.
   virtual void StreamGenerated(
       const std::string& label,
       const StreamDeviceInfoArray& audio_devices,
       const StreamDeviceInfoArray& video_devices) OVERRIDE;
-
   virtual void StreamGenerationFailed(const std::string& label) OVERRIDE;
   virtual void AudioDeviceFailed(const std::string& label, int index) OVERRIDE;
   virtual void VideoDeviceFailed(const std::string& label, int index) OVERRIDE;
+  virtual void DevicesEnumerated(const std::string& label,
+                                 const StreamDeviceInfoArray& devices) OVERRIDE;
+  virtual void DevicesEnumerationFailed(const std::string& label) OVERRIDE;
+  virtual void DeviceOpened(const std::string& label,
+                            const StreamDeviceInfo& video_device) OVERRIDE;
+  virtual void DeviceOpenFailed(const std::string& label) OVERRIDE;
 
   // content::BrowserMessageFilter implementation.
   virtual bool OnMessageReceived(const IPC::Message& message,
                                  bool* message_was_ok) OVERRIDE;
   virtual void OnChannelClosing() OVERRIDE;
 
  private:
   friend class MockMediaStreamDispatcherHost;
 
   void OnGenerateStream(int render_view_id,
                         int page_request_id,
                         const StreamOptions& components,
                         const std::string& security_origin);
 
   void OnStopGeneratedStream(int render_view_id, const std::string& label);
 
+  void OnEnumerateDevices(int render_view_id,
+                          int page_request_id,
+                          media_stream::MediaStreamType type,
+                          const std::string& security_origin);
+
+  void OnOpenDevice(int render_view_id,
+                    int page_request_id,
+                    const std::string& device_id,
+                    media_stream::MediaStreamType type,
+                    const std::string& security_origin);
+
   // Returns the media stream manager to forward events to,
   // creating one if needed.
   MediaStreamManager* manager();
 
   const content::ResourceContext* resource_context_;
   int render_process_id_;
 
   struct StreamRequest;
   typedef std::map<std::string, StreamRequest> StreamMap;
   // Streams generated for this host.
   StreamMap streams_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamDispatcherHost);
 };
 
 }  // namespace media_stream
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_DISPATCHER_HOST_H_