Move StringToLowerASCII to base namespace

ui/gfx/font_fallback_win.cc

 // 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.
 
 #include "ui/gfx/font_fallback_win.h"
 
 #include <usp10.h>
 
 #include <map>
 
@@ skipping 10 matching lines @@
 namespace {
 
 // Queries the registry to get a mapping from font filenames to font names.
 void QueryFontsFromRegistry(std::map<std::string, std::string>* map) {
   const wchar_t* kFonts =
       L"Software\\Microsoft\\Windows NT\\CurrentVersion\\Fonts";
 
   base::win::RegistryValueIterator it(HKEY_LOCAL_MACHINE, kFonts);
   for (; it.Valid(); ++it) {
     const std::string filename =
-        StringToLowerASCII(base::WideToUTF8(it.Value()));
+        base::StringToLowerASCII(base::WideToUTF8(it.Value()));
     (*map)[filename] = base::WideToUTF8(it.Name());
   }
 }
 
 // Fills |font_names| with a list of font families found in the font file at
 // |filename|. Takes in a |font_map| from font filename to font families, which
 // is filled-in by querying the registry, if empty.
 void GetFontNamesFromFilename(const std::string& filename,
                               std::map<std::string, std::string>* font_map,
                               std::vector<std::string>* font_names) {
   if (font_map->empty())
     QueryFontsFromRegistry(font_map);
 
   std::map<std::string, std::string>::const_iterator it =
-      font_map->find(StringToLowerASCII(filename));
+      font_map->find(base::StringToLowerASCII(filename));
   if (it == font_map->end())
     return;
 
   internal::ParseFontFamilyString(it->second, font_names);
 }
 
 // Returns true if |text| contains only ASCII digits.
 bool ContainsOnlyDigits(const std::string& text) {
   return text.find_first_not_of("0123456789") == base::string16::npos;
 }
@@ skipping 257 matching lines @@
                      font.GetFontSize());
       found_fallback = true;
     }
   }
   DeleteEnhMetaFile(meta_file);
 
   return found_fallback;
 }
 
 }  // namespace gfx