MediaRouterAction: Only observe Media Routes when there is a local route.

chrome/browser/media/router/local_media_routes_observer.h

Index: chrome/browser/media/router/local_media_routes_observer.h
diff --git a/chrome/browser/media/router/local_media_routes_observer.h b/chrome/browser/media/router/local_media_routes_observer.h
new file mode 100644
index 0000000000000000000000000000000000000000..54a4697745e669932aade9d8a63c85390b6132e7
--- /dev/null
+++ b/chrome/browser/media/router/local_media_routes_observer.h
@@ -0,0 +1,34 @@
+// Copyright 2015 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 CHROME_BROWSER_MEDIA_ROUTER_LOCAL_MEDIA_ROUTES_OBSERVER_H_
+#define CHROME_BROWSER_MEDIA_ROUTER_LOCAL_MEDIA_ROUTES_OBSERVER_H_
+
+#include <vector>
+
+// #include "base/macros.h"

[imcheng, 2015/10/01 18:46:50]

remove these includes? they don't appear to be used.

[apacible, 2015/10/01 23:21:47]

Done.

+#include "chrome/browser/media/router/media_route.h"
+
+namespace media_router {
+
+class MediaRouter;
+
+// Base class for observing when a new route has been created locally.
+class LocalMediaRoutesObserver {
+ public:
+  explicit LocalMediaRoutesObserver(MediaRouter* router);
+  virtual ~LocalMediaRoutesObserver();
+
+  // Called when a local route has been successfully created.
+  virtual void OnLocalRouteCreated() {}
+
+ private:
+  MediaRouter* router_;

[imcheng, 2015/10/01 18:46:49]

MediaRouter* const router_;

[apacible, 2015/10/01 23:21:47]

Done.

+
+  DISALLOW_COPY_AND_ASSIGN(LocalMediaRoutesObserver);
+};
+
+}  // namespace media_router
+
+#endif  // CHROME_BROWSER_MEDIA_ROUTER_LOCAL_MEDIA_ROUTES_OBSERVER_H_