Revert of [Media Router] Design MediaRouter interface with stub implementation.

chrome/browser/media/router/media_route.h

Index: chrome/browser/media/router/media_route.h
diff --git a/chrome/browser/media/router/media_route.h b/chrome/browser/media/router/media_route.h
index 1769a57ee5af613037cca8c92d5b8e3a5b569c4b..a8564f63d0449be3e7080ceed2bf795fcb69b8f7 100644
--- a/chrome/browser/media/router/media_route.h
+++ b/chrome/browser/media/router/media_route.h
@@ -16,6 +16,10 @@
 #include "url/gurl.h"
 
 namespace media_router {
+
+using RouteRequestId = int64;
+
+class MediaRouteFactory;
 
 // For now, a simple transition graph: NEW -> CONNECTED -> CLOSED.
 enum MediaRouteState {
@@ -44,6 +48,7 @@
              const MediaSink& media_sink,
              const std::string& description,
              bool is_local);
+
   ~MediaRoute();
 
   // The media route identifier.
@@ -70,12 +75,12 @@
   bool Equals(const MediaRoute& other) const;
 
  private:
-  MediaRouteId media_route_id_;
-  MediaSource media_source_;
-  MediaSink media_sink_;
-  std::string description_;
-  bool is_local_;
-  MediaRouteState state_;
+  const MediaRouteId media_route_id_;
+  const MediaSource media_source_;
+  const MediaSink media_sink_;
+  const std::string description_;
+  const bool is_local_;
+  const MediaRouteState state_;
 };
 
 }  // namespace media_router