[Media Router] Use DialMediaSinkService in MediaRouterMojoImpl

chrome/browser/media/router/media_router_feature.h

 // 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_MEDIA_ROUTER_FEATURE_H_
 #define CHROME_BROWSER_MEDIA_ROUTER_MEDIA_ROUTER_FEATURE_H_
 
 namespace content {
 class BrowserContext;
 }
 
 namespace media_router {
 
 // Returns true if Media Router is enabled for |context|.
 bool MediaRouterEnabled(content::BrowserContext* context);
 
+#if !defined(OS_ANDROID)
+// Returns true if browser side DIAL discovery is enabled.
+bool DialLocalDiscoveryEnabled();
+
+// Returns true if browser side Cast discovery is enabled.
+bool CastDiscoveryEnabled();
+#endif
+
 }  // namespace media_router
 
 #endif  // CHROME_BROWSER_MEDIA_ROUTER_MEDIA_ROUTER_FEATURE_H_