Remove #pragma once from content

content/browser/worker_host/worker_document_set.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_WORKER_HOST_WORKER_DOCUMENT_SET_H_
 #define CONTENT_BROWSER_WORKER_HOST_WORKER_DOCUMENT_SET_H_
-#pragma once
 
 #include <set>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 
 class WorkerMessageFilter;
 
 // The WorkerDocumentSet tracks all of the DOM documents associated with a
 // set of workers. With nested workers, multiple workers can share the same
@@ skipping 63 matching lines @@
   const DocumentInfoSet& documents() { return document_set_; }
 
  private:
   friend class base::RefCounted<WorkerDocumentSet>;
   virtual ~WorkerDocumentSet();
 
   DocumentInfoSet document_set_;
 };
 
 #endif  // CONTENT_BROWSER_WORKER_HOST_WORKER_DOCUMENT_SET_H_