Remove #pragma once from content

content/test/browser_test_base.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_TEST_BROWSER_TEST_BASE_H_
 #define CONTENT_TEST_BROWSER_TEST_BASE_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 class BrowserTestBase : public testing::Test {
  public:
   BrowserTestBase();
   virtual ~BrowserTestBase();
 
   // We do this so we can be used in a Task.
@@ skipping 27 matching lines @@
   // This is invoked from main after browser_init/browser_main have completed.
   // This prepares for the test by creating a new browser, runs the test
   // (RunTestOnMainThread), quits the browsers and returns.
   virtual void RunTestOnMainThreadLoop() = 0;
 
  private:
   void ProxyRunTestOnMainThreadLoop();
 };
 
 #endif  // CONTENT_TEST_BROWSER_TEST_BASE_H_