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

chrome/browser/media/router/media_route.cc

Index: chrome/browser/media/router/media_route.cc
diff --git a/chrome/browser/media/router/media_route.cc b/chrome/browser/media/router/media_route.cc
index 6a7fbbd69b59ef0185f7228cda872892184faa41..23cc018541015297711ec944f707caf978f4acfb 100644
--- a/chrome/browser/media/router/media_route.cc
+++ b/chrome/browser/media/router/media_route.cc
@@ -23,12 +23,12 @@ MediaRoute::MediaRoute(const MediaRoute::Id& media_route_id,
       is_local_(is_local),
       custom_controller_path_(custom_controller_path),
       for_display_(for_display),
-      off_the_record_(false) {}
+      off_the_record_(false),
+      is_offscreen_presentation_(false) {}
 
 MediaRoute::MediaRoute(const MediaRoute& other) = default;
 
-MediaRoute::~MediaRoute() {
-}
+MediaRoute::~MediaRoute() = default;
 
 bool MediaRoute::Equals(const MediaRoute& other) const {
   return media_route_id_ == other.media_route_id_;