Pass origin to StartObservingMediaSinks.

chrome/test/media_router/media_router_e2e_browsertest.h

Index: chrome/test/media_router/media_router_e2e_browsertest.h
diff --git a/chrome/test/media_router/media_router_e2e_browsertest.h b/chrome/test/media_router/media_router_e2e_browsertest.h
index ded831d028a3c70719d00c163fee0f6b6bc77992..864babf6744ef8db06a57db5b3e57ec4e34b56ca 100644
--- a/chrome/test/media_router/media_router_e2e_browsertest.h
+++ b/chrome/test/media_router/media_router_e2e_browsertest.h
@@ -37,14 +37,12 @@ class MediaRouterE2EBrowserTest : public MediaRouterIntegrationBrowserTest {
   // finds sink with name matching receiver_, and establishes media
   // route between the source and sink.
   // |observer_| and |route_id_| will be initialized.
-  // |origin| is the URL of requestor's page.
   // |web_contents| identifies the tab in which the request was made.
-  // |origin| and |web_contents| are used for enforcing same-origin and/or
+  // |source| and |web_contents| are used for enforcing same-origin and/or
   // same-tab scope for JoinRoute() requests. (e.g., if enforced, the page
   // requesting JoinRoute() must have the same origin as the page that
   // requested CreateRoute()).
   void CreateMediaRoute(const MediaSource& source,
-                        const GURL& origin,
                         content::WebContents* web_contents);
 
   // Stops the established media route and unregisters |observer_|.