Fix FontFaceSet state getting stuck at loading

third_party/WebKit/Source/core/css/FontFace.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 363 matching lines @@
 
 ScriptPromise FontFace::load(ScriptState* scriptState)
 {
     loadInternal(scriptState->getExecutionContext());
     return fontStatusPromise(scriptState);
 }
 
 void FontFace::loadWithCallback(LoadFontCallback* callback, ExecutionContext* context)
 {
     loadInternal(context);
+    addCallback(callback);
+}
+
+void FontFace::addCallback(LoadFontCallback* callback)
+{
     if (m_status == Loaded)
         callback->notifyLoaded(this);
     else if (m_status == Error)
         callback->notifyError(this);
     else
         m_callbacks.append(callback);
 }
 
 void FontFace::loadInternal(ExecutionContext* context)
 {
@@ skipping 227 matching lines @@
 {
     return m_cssFontFace->hadBlankText();
 }
 
 bool FontFace::hasPendingActivity() const
 {
     return m_status == Loading && getExecutionContext() && !getExecutionContext()->activeDOMObjectsAreStopped();
 }
 
 } // namespace blink