Remove #pragma once from chrome/browser/extensions

chrome/browser/extensions/extension_metrics_module.h

 // Copyright (c) 2012 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 CHROME_BROWSER_EXTENSIONS_EXTENSION_METRICS_MODULE_H__
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_METRICS_MODULE_H__
-#pragma once
 
 #include <string>
 
 #include "base/metrics/histogram.h"
 #include "chrome/browser/extensions/extension_function.h"
 
 class MetricsRecordUserActionFunction : public SyncExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION_NAME("metricsPrivate.recordUserAction")
 
@@ skipping 95 matching lines @@
   DECLARE_EXTENSION_FUNCTION_NAME("metricsPrivate.recordLongTime")
 
  protected:
   virtual ~MetricsRecordLongTimeFunction() {}
 
   // ExtensionFunction:
   virtual bool RunImpl() OVERRIDE;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_METRICS_MODULE_H__