Update to Chromium version 72.0.3615.0 (#609159)

- The |category| value for all TRACE calls from CEF client applications is now
  "cef.client" due to https://crrev.com/331266377d.
- The |with_menu_marker| parameter to CreateMenuButton has been removed due to
  https://crrev.com/7f7e382118.

libcef/common/main_delegate.cc

@@ -283,7 +283,8 @@ class CefUIThread : public base::Thread {
 
     // Release MessagePump resources registered with the AtExitManager.
     base::MessageLoop* ml = const_cast<base::MessageLoop*>(message_loop());
-    base::MessageLoopCurrent::UnbindFromCurrentThreadInternal(ml);
+    base::MessageLoopCurrent::UnbindFromCurrentThreadInternal(
+        ml->GetMessageLoopBase());
     ml->ReleasePump();
 
     // Run exit callbacks on the UI thread to avoid sequence check failures.