[Presentation API] Add support for multiple URLs in PresentationRequest on Media Router UI side

chrome/browser/media/router/presentation_service_delegate_impl.cc

Index: chrome/browser/media/router/presentation_service_delegate_impl.cc
diff --git a/chrome/browser/media/router/presentation_service_delegate_impl.cc b/chrome/browser/media/router/presentation_service_delegate_impl.cc
index 7ac0b82de939bde08dc48d08aff34f1d032ddbf4..a3c9b316086f13def562f3b1d91bad736d31dc3a 100644
--- a/chrome/browser/media/router/presentation_service_delegate_impl.cc
+++ b/chrome/browser/media/router/presentation_service_delegate_impl.cc
@@ -548,8 +548,8 @@ void PresentationFrameManager::SetDefaultPresentationUrl(
   } else {
     DCHECK(!callback.is_null());
     GURL frame_url(GetLastCommittedURLForFrame(render_frame_host_id));
-    PresentationRequest request(render_frame_host_id, default_presentation_url,
-                                frame_url);
+    PresentationRequest request(
+        render_frame_host_id, {default_presentation_url}, frame_url);
     default_presentation_started_callback_ = callback;
     SetDefaultPresentationRequest(request);
   }