[Media Router] Add Media Router Mojo impl code.

chrome/browser/media/router/media_router_type_converters.h

Index: chrome/browser/media/router/media_router_type_converters.h
diff --git a/chrome/browser/media/router/media_router_type_converters.h b/chrome/browser/media/router/media_router_type_converters.h
index 23d8c3648efe531389f66db9125785b2354698bf..8859673f04f22a60d58fcb9eae0dbb04387a6901 100644
--- a/chrome/browser/media/router/media_router_type_converters.h
+++ b/chrome/browser/media/router/media_router_type_converters.h
@@ -8,6 +8,7 @@
 #include <string>
 #include <vector>
 
+#include "base/memory/scoped_ptr.h"
 #include "chrome/browser/media/router/issue.h"
 #include "chrome/browser/media/router/media_router.mojom.h"
 #include "chrome/browser/media/router/media_sink.h"
@@ -43,6 +44,13 @@ struct TypeConverter<media_router::MediaRoute,
 };
 
 template <>
+struct TypeConverter<scoped_ptr<media_router::MediaRoute>,
+                     media_router::interfaces::MediaRoutePtr> {
+  static scoped_ptr<media_router::MediaRoute> Convert(
+      const media_router::interfaces::MediaRoutePtr& input);
+};
+
+template <>
 struct TypeConverter<media_router::interfaces::MediaRoutePtr,
                      media_router::MediaRoute> {
   static media_router::interfaces::MediaRoutePtr Convert(