Sync "restrained media controller" with the spec

Source/core/html/MediaController.cpp

 /*
  * Copyright (C) 2011 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 485 matching lines @@
     // A MediaController is a restrained media controller if the MediaController is a playing media
     // controller,
     if (m_paused)
         return false;
 
     bool anyAutoplayingAndPaused = false;
     bool allPaused = true;
     for (MediaElementSequence::const_iterator it = m_mediaElements.begin(); it != m_mediaElements.end(); ++it) {
         HTMLMediaElement* element = *it;
 
-        // and none of its slaved media elements are blocked media elements,
-        if (element->isBlocked())
-            return false;
-
         if (element->isAutoplaying() && element->paused())
             anyAutoplayingAndPaused = true;
 
         if (!element->paused())
             allPaused = false;
     }
 
     // but either at least one of its slaved media elements whose autoplaying flag is true still has
     // its paused attribute set to true, or, all of its slaved media elements have their paused
     // attribute set to true.
@@ skipping 97 matching lines @@
 {
 #if ENABLE(OILPAN)
     visitor->trace(m_mediaElements);
     visitor->trace(m_pendingEventsQueue);
     visitor->trace(m_executionContext);
 #endif
     EventTargetWithInlineData::trace(visitor);
 }
 
 }