Reland of Add support for device-change notifications to MediaStreamDispatcher

content/renderer/media/user_media_client_impl.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.
 
 #ifndef CONTENT_RENDERER_MEDIA_USER_MEDIA_CLIENT_IMPL_H_
 #define CONTENT_RENDERER_MEDIA_USER_MEDIA_CLIENT_IMPL_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 65 matching lines @@
   void OnStreamGenerationFailed(int request_id,
                                 MediaStreamRequestResult result) override;
   void OnDeviceStopped(const std::string& label,
                        const StreamDeviceInfo& device_info) override;
   void OnDevicesEnumerated(int request_id,
                            const StreamDeviceInfoArray& device_array) override;
   void OnDeviceOpened(int request_id,
                       const std::string& label,
                       const StreamDeviceInfo& device_info) override;
   void OnDeviceOpenFailed(int request_id) override;
+  void OnDevicesChanged() override;
 
   // RenderFrameObserver override
   void FrameWillClose() override;
 
  protected:
   // Called when |source| has been stopped from JavaScript.
   void OnLocalSourceStopped(const blink::WebMediaStreamSource& source);
 
   // These methods are virtual for test purposes. A test can override them to
   // test requesting local media streams. The function notifies WebKit that the
@@ skipping 165 matching lines @@
   // Note: This member must be the last to ensure all outstanding weak pointers
   // are invalidated first.
   base::WeakPtrFactory<UserMediaClientImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(UserMediaClientImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_USER_MEDIA_CLIENT_IMPL_H_