Remove #pragma once from chrome/browser/extensions

chrome/browser/extensions/extension_test_api.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_TEST_API_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_TEST_API_H_
-#pragma once
 
 #include "base/values.h"
 #include "chrome/browser/extensions/extension_function.h"
 
 template <typename T> struct DefaultSingletonTraits;
 
 // A function that is only available in tests.
 // Prior to running, checks that we are in an extension process.
 class TestExtensionFunction : public SyncExtensionFunction {
  protected:
@@ skipping 107 matching lines @@
     DISALLOW_COPY_AND_ASSIGN(TestConfigState);
   };
 
   virtual ~ExtensionTestGetConfigFunction();
 
   // ExtensionFunction:
   virtual bool RunImpl() OVERRIDE;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_TEST_API_H_