Move more string_util functions to base namespace.

components/translate/core/language_detection/language_detection_util.cc

 // Copyright 2014 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 "components/translate/core/language_detection/language_detection_util.h"
 
 #include "base/logging.h"
 #include "base/metrics/field_trial.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
@@ skipping 306 matching lines @@
   if (chunks.size() < 1 || 2 < chunks.size())
     return false;
 
   const std::string& main_code = chunks[0];
 
   if (main_code.size() < 1 || 3 < main_code.size())
     return false;
 
   for (std::string::const_iterator it = main_code.begin();
        it != main_code.end(); ++it) {
-    if (!IsAsciiAlpha(*it))
+    if (!base::IsAsciiAlpha(*it))
       return false;
   }
 
   if (chunks.size() == 1)
     return true;
 
   const std::string& sub_code = chunks[1];
 
   if (sub_code.size() != 2)
     return false;
 
   for (std::string::const_iterator it = sub_code.begin();
        it != sub_code.end(); ++it) {
-    if (!IsAsciiAlpha(*it))
+    if (!base::IsAsciiAlpha(*it))
       return false;
   }
 
   return true;
 }
 
 bool IsSameOrSimilarLanguages(const std::string& page_language,
                               const std::string& cld_language) {
   std::vector<std::string> chunks;
 
@@ skipping 38 matching lines @@
   // distinguish from English, and the language is one of well-known languages
   // which often provide "en-*" meta information mistakenly.
   for (size_t i = 0; i < arraysize(kWellKnownCodesOnWrongConfiguration); ++i) {
     if (cld_language == kWellKnownCodesOnWrongConfiguration[i])
       return true;
   }
   return false;
 }
 
 }  // namespace translate