Use a direct include of utf_string_conversions.h in android_webview/, apps/, ash/, base/.

base/i18n/string_compare.cc

 // Copyright (c) 2013 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.
 
 #include "base/i18n/string_compare.h"
 
 #include "base/logging.h"
-#include "base/utf_string_conversions.h"
+#include "base/strings/utf_string_conversions.h"
 
 namespace base {
 namespace i18n {
 
 // Compares the character data stored in two different string16 strings by
 // specified Collator instance.
 UCollationResult CompareString16WithCollator(const icu::Collator* collator,
                                              const string16& lhs,
                                              const string16& rhs) {
   DCHECK(collator);
   UErrorCode error = U_ZERO_ERROR;
   UCollationResult result = collator->compare(
       static_cast<const UChar*>(lhs.c_str()), static_cast<int>(lhs.length()),
       static_cast<const UChar*>(rhs.c_str()), static_cast<int>(rhs.length()),
       error);
   DCHECK(U_SUCCESS(error));
   return result;
 }
 
 }  // namespace i18n
 }  // namespace base