Pass origin to StartObservingMediaSinks.

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 ee50d71f6a75cbff3d128fb813eb4800d12aefc5..b3f6f1d3f491de55710c3a7a07df3c7c523180a8 100644
--- a/chrome/browser/media/router/presentation_service_delegate_impl.cc
+++ b/chrome/browser/media/router/presentation_service_delegate_impl.cc
@@ -69,7 +69,8 @@ class PresentationFrame {
 
   // Mirror corresponding APIs in PresentationServiceDelegateImpl.
   bool SetScreenAvailabilityListener(
-      content::PresentationScreenAvailabilityListener* listener);
+      content::PresentationScreenAvailabilityListener* listener,
+      const GURL &origin);
   bool RemoveScreenAvailabilityListener(
       content::PresentationScreenAvailabilityListener* listener);
   bool HasScreenAvailabilityListenerForTest(
@@ -154,13 +155,14 @@ const std::vector<MediaRoute::Id> PresentationFrame::GetRouteIds() const {
 }
 
 bool PresentationFrame::SetScreenAvailabilityListener(
-    content::PresentationScreenAvailabilityListener* listener) {
+    content::PresentationScreenAvailabilityListener* listener,
+    const GURL &origin) {
   if (sinks_observer_ && sinks_observer_->listener() == listener)
     return false;
 
   MediaSource source(GetMediaSourceFromListener(listener));
   sinks_observer_.reset(
-      new PresentationMediaSinksObserver(router_, listener, source));
+      new PresentationMediaSinksObserver(router_, listener, source, origin));
 
   if (!sinks_observer_->Init()) {
     sinks_observer_.reset();
@@ -422,7 +424,8 @@ bool PresentationFrameManager::SetScreenAvailabilityListener(
     content::PresentationScreenAvailabilityListener* listener) {
   DCHECK(listener);
   auto presentation_frame = GetOrAddPresentationFrame(render_frame_host_id);
-  return presentation_frame->SetScreenAvailabilityListener(listener);
+  GURL frame_url(GetLastCommittedURLForFrame(render_frame_host_id));
+  return presentation_frame->SetScreenAvailabilityListener(listener, frame_url);
 }
 
 bool PresentationFrameManager::RemoveScreenAvailabilityListener(