[Presentation API] (5th) (1-UA) integrate controller and receiver side for 1-UA messaging

chrome/browser/media/router/offscreen_presentation_manager.cc

Index: chrome/browser/media/router/offscreen_presentation_manager.cc
diff --git a/chrome/browser/media/router/offscreen_presentation_manager.cc b/chrome/browser/media/router/offscreen_presentation_manager.cc
index 79dd2e82fe0825e05edd1443892951bca21457b4..0c00e4605d95f5a69198b1fe87a320c74d97c927 100644
--- a/chrome/browser/media/router/offscreen_presentation_manager.cc
+++ b/chrome/browser/media/router/offscreen_presentation_manager.cc
@@ -62,7 +62,7 @@ void OffscreenPresentationManager::UnregisterOffscreenPresentationController(
   // Remove presentation if no controller and receiver.
   it->second->UnregisterController(render_frame_host_id);
   if (!it->second->IsValid()) {
-    DLOG(WARNING) << __func__ << "no receiver callback has been registered to "
+    DLOG(WARNING) << __func__ << " no receiver callback has been registered to "
                   << "[presentation_id]: " << presentation_id;
     offscreen_presentations_.erase(presentation_id);
   }