[MediaRouter] Moved the code useful for Android to MediaRouterDialogController

chrome/browser/ui/toolbar/media_router_action.h

Index: chrome/browser/ui/toolbar/media_router_action.h
diff --git a/chrome/browser/ui/toolbar/media_router_action.h b/chrome/browser/ui/toolbar/media_router_action.h
index 1a95d55be5f347fea72d8a79f54206e370fdcb2f..6cc6073cf8ca7248525faab2f2efbcf26108f187 100644
--- a/chrome/browser/ui/toolbar/media_router_action.h
+++ b/chrome/browser/ui/toolbar/media_router_action.h
@@ -12,7 +12,7 @@ class Browser;
 class MediaRouterActionPlatformDelegate;
 
 namespace media_router {
-class MediaRouterDialogControllerImpl;
+class MediaRouterDialogController;
 }  // namespace media_router
 
 // The class for the Media Router component action that will be shown in
@@ -47,8 +47,7 @@ class MediaRouterAction : public ToolbarActionViewController {
   // Returns a reference to the MediaRouterDialogController associated with
   // |delegate_|'s current WebContents. Guaranteed to be non-null.
   // |delegate_| and its current WebContents must not be null.
-  media_router::MediaRouterDialogControllerImpl*
-      GetMediaRouterDialogController();
+  media_router::MediaRouterDialogController* GetMediaRouterDialogController();
 
   const std::string id_;
   const base::string16 name_;