[Presentation API] 1-UA presentation support + presenter APIs.

chrome/browser/media/router/media_router.h

Index: chrome/browser/media/router/media_router.h
diff --git a/chrome/browser/media/router/media_router.h b/chrome/browser/media/router/media_router.h
index 3612dcc5ef60ec2db83db91ef617c1577bdf1902..a871293116cdf0c83dfc6e54561c9e46e08b3397 100644
--- a/chrome/browser/media/router/media_router.h
+++ b/chrome/browser/media/router/media_router.h
@@ -33,14 +33,17 @@ class PresentationSessionMessagesObserver;
 //     |CreateRoute()|, the ID is generated by MediaRouter and is guaranteed to
 //     be unique.
 // |error|: Empty string.
+// |is_one_ua_presentation|: true if route is a 1-UA presentation.
 // On failure:
 // |route|: nullptr
 // |presentation_id|: Empty string.
 // |error|: Non-empty string describing the error.
+// |is_one_ua_presentation|: false.
 using MediaRouteResponseCallback =
     base::Callback<void(const MediaRoute* route,
                         const std::string& presentation_id,
-                        const std::string& error)>;
+                        const std::string& error,
+                        bool is_one_ua_presentation)>;
 
 // Used in cases where a tab ID is not applicable in CreateRoute/JoinRoute.
 const int kInvalidTabId = -1;