Move LowerCaseEqualsASCII to base namespace

ui/base/l10n/l10n_util_posix.cc

 // 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.
 
 #include <string>
 
 #if defined(OS_CHROMEOS)
 #include "base/basictypes.h"
 #include "base/strings/string_util.h"
 #endif
 
 namespace l10n_util {
 
 bool IsLocaleSupportedByOS(const std::string& locale) {
 #if defined(OS_CHROMEOS)
   // We don't have translations yet for am, and sw.
   // TODO(jungshik): Once the above issues are resolved, change this back
   // to return true.
   static const char kUnsupportedLocales[][3] = {"am", "sw"};
   for (size_t i = 0; i < arraysize(kUnsupportedLocales); ++i) {
-    if (LowerCaseEqualsASCII(locale, kUnsupportedLocales[i]))
+    if (base::LowerCaseEqualsASCII(locale, kUnsupportedLocales[i]))
       return false;
   }
   return true;
 #else
   // Return true blindly for now.
   return true;
 #endif
 }
 
 }  // namespace l10n_util