base: Minor cleanups in icu_util.h

base/i18n/icu_util.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 BASE_I18N_ICU_UTIL_H_
 #define BASE_I18N_ICU_UTIL_H_
 
 #include "base/i18n/base_i18n_export.h"
 
-namespace icu_util {
+namespace base {
+namespace i18n {
 
 // Call this function to load ICU's data tables for the current process.  This
 // function should be called before ICU is used.
-BASE_I18N_EXPORT bool Initialize();
+BASE_I18N_EXPORT bool InitializeICU();
 
-}  // namespace icu_util
+}  // namespace i18n
+}  // namespace base
 
 #endif  // BASE_I18N_ICU_UTIL_H_