Remove some unused includes from core/css and core/dom

Source/core/dom/ActiveDOMObject.cpp

 /*
  * Copyright (C) 2008 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 11 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
  *
  */
 
 #include "config.h"
 #include "core/dom/ActiveDOMObject.h"
 
 #include "core/dom/ScriptExecutionContext.h"
 #include "core/dom/WebCoreMemoryInstrumentation.h"
-#include "core/workers/WorkerContext.h"
-#include "core/workers/WorkerThread.h"
 
 namespace WebCore {
 
 ActiveDOMObject::ActiveDOMObject(ScriptExecutionContext* scriptExecutionContext)
     : ContextDestructionObserver(scriptExecutionContext)
     , m_pendingActivityCount(0)
 #if !ASSERT_DISABLED
     , m_suspendIfNeededCalled(false)
 #endif
 {
@@ skipping 57 matching lines @@
 {
 }
 
 void ActiveDOMObject::reportMemoryUsage(MemoryObjectInfo* memoryObjectInfo) const
 {
     MemoryClassInfo info(memoryObjectInfo, this, WebCoreMemoryTypes::DOM);
 }
 
 
 } // namespace WebCore