Adding a skeleton MediaStreamCenter.

content/renderer/media/media_stream_center.cc

+// 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.
+
+#include "content/renderer/media/media_stream_center.h"
+
+#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebMediaStreamCenterClient.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebMediaStreamDescriptor.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebMediaStreamSource.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebMediaStreamSourcesRequest.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebVector.h"
+
+namespace content {
+
+MediaStreamCenter::MediaStreamCenter(
+    WebKit::WebMediaStreamCenterClient* client)
+    : client_(client) {
+}
+
+void MediaStreamCenter::queryMediaStreamSources(
+    const WebKit::WebMediaStreamSourcesRequest& request) {
+  WebKit::WebVector<WebKit::WebMediaStreamSource> audioSources, videoSources;
+  request.didCompleteQuery(audioSources, videoSources);
+}
+
+void MediaStreamCenter::didEnableMediaStreamTrack(
+    const WebKit::WebMediaStreamDescriptor& stream,
+    const WebKit::WebMediaStreamComponent& component) {
+}
+
+void MediaStreamCenter::didDisableMediaStreamTrack(
+    const WebKit::WebMediaStreamDescriptor& stream,
+    const WebKit::WebMediaStreamComponent& component) {
+}
+
+void MediaStreamCenter::didStopLocalMediaStream(
+    const WebKit::WebMediaStreamDescriptor& stream) {
+}
+
+void MediaStreamCenter::didConstructMediaStream(
+    const WebKit::WebMediaStreamDescriptor& stream) {
+}
+
+}  // namespace content