Remove #pragma once. Just from base/ for now.

base/android/locale_utils.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 BASE_ANDROID_LOCALE_UTILS_H_
 #define BASE_ANDROID_LOCALE_UTILS_H_
-#pragma once
 
 #include <jni.h>
 
 #include <string>
 
 #include "base/string16.h"
 
 namespace base {
 namespace android {
 
 // Return the current default locale of the device.
 std::string GetDefaultLocale();
 
 string16 GetDisplayNameForLocale(const std::string& locale,
                                  const std::string& display_locale);
 
 bool RegisterLocaleUtils(JNIEnv* env);
 
 }  // namespace android
 }  // namespace base
 
 #endif  // BASE_ANDROID_LOCALE_UTILS_H_