Adding MediaStreamManager.

content/browser/renderer_host/media/media_stream_requester.h

Index: content/browser/renderer_host/media/media_stream_requester.h
===================================================================
--- content/browser/renderer_host/media/media_stream_requester.h	(revision 0)
+++ content/browser/renderer_host/media/media_stream_requester.h	(revision 0)
@@ -0,0 +1,39 @@
+// 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_REQUESTER_H_
+#define CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_REQUESTER_H_
+
+#include <string>
+
+#include "content/common/media/media_stream_options.h"
+
+namespace media_stream {
+
+// MediaStreamRequester must be implemented by the class requesting a new media
+// stream to be opened. MediaStreamManager will use this interface to signal
+// success and error for a request.
+class MediaStreamRequester {
+ public:
+  // Called as a reply of a successful call to GenerateStream.
+  virtual void StreamGenerated(const std::string& label,
+                               const StreamDeviceInfoArray& audio_devices,
+                               const StreamDeviceInfoArray& video_devices) = 0;
+  // Called if GenerateStream failed.
+  virtual void StreamGenerationFailed(const std::string& label) = 0;
+  // AudioDeviceFailed is called if an already opened audio device encounters
+  // an error.
+  virtual void AudioDeviceFailed(const std::string& label, int index) = 0;
+  // VideoDeviceFailed is called if an already opened video device encounters
+  // an error.
+  virtual void VideoDeviceFailed(const std::string& label, int index) = 0;
+
+ protected:
+  virtual ~MediaStreamRequester() {
+  }
+};
+
+}  // namespace media_stream
+
+#endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_REQUESTER_H_