Remove unused includes from core/{editing,fileapi,history,html}

Source/core/html/DOMURL.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  * Copyright (C) 2012 Motorola Mobility Inc.
  *
  * 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.
@@ skipping 19 matching lines @@
 
 #include "core/dom/ScriptExecutionContext.h"
 #include "core/fileapi/Blob.h"
 #include "core/fileapi/BlobURL.h"
 #include "core/html/PublicURLManager.h"
 #include "core/loader/cache/MemoryCache.h"
 #include "modules/mediasource/MediaSourceBase.h"
 #include "modules/mediastream/MediaStream.h"
 #include "weborigin/KURL.h"
 #include "wtf/MainThread.h"
-#include "wtf/PassOwnPtr.h"
 
 namespace WebCore {
 
 String DOMURL::createObjectURL(ScriptExecutionContext* scriptExecutionContext, MediaSourceBase* source)
 {
     // Since WebWorkers cannot obtain MediaSource objects, we should be on the main thread.
     ASSERT(isMainThread());
 
     if (!scriptExecutionContext || !source)
         return String();
@@ skipping 32 matching lines @@
 {
     if (!scriptExecutionContext)
         return;
 
     KURL url(KURL(), urlString);
     MemoryCache::removeURLFromCache(scriptExecutionContext, url);
     scriptExecutionContext->publicURLManager().revoke(url);
 }
 
 } // namespace WebCore