[Media Router WebUI] Handle route details in incognito.

chrome/browser/ui/webui/media_router/media_router_webui_message_handler.cc

Index: chrome/browser/ui/webui/media_router/media_router_webui_message_handler.cc
diff --git a/chrome/browser/ui/webui/media_router/media_router_webui_message_handler.cc b/chrome/browser/ui/webui/media_router/media_router_webui_message_handler.cc
index 07e730c9a8ee98ad3a586dd491c442f39564ce4f..27dba72a1377b2607e4f478184a59729854167e9 100644
--- a/chrome/browser/ui/webui/media_router/media_router_webui_message_handler.cc
+++ b/chrome/browser/ui/webui/media_router/media_router_webui_message_handler.cc
@@ -410,6 +410,9 @@ void MediaRouterWebUIMessageHandler::OnRequestInitialData(
       cast_modes, media_router_ui_->GetPresentationRequestSourceName()));
   initial_data.Set("castModes", cast_modes_list.release());
 
+  Profile* profile = Profile::FromWebUI(web_ui());
+  initial_data.SetBoolean("isOffTheRecord", profile->IsOffTheRecord());
+
   web_ui()->CallJavascriptFunction(kSetInitialData, initial_data);
   media_router_ui_->UIInitialized();
 }