Replace base::str[n]casecmp with helper functions.

ui/gfx/test/fontconfig_util_linux.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 "ui/gfx/test/fontconfig_util_linux.h"
 
 #include <fontconfig/fontconfig.h>
 
 #include "base/files/file_util.h"
 #include "base/logging.h"
@@ skipping 82 matching lines @@
     LOG(ERROR) << "Failed to load font " << path.value();
     return false;
   }
 
   return true;
 }
 
 bool LoadSystemFontIntoFontconfig(const std::string& basename) {
   for (size_t i = 0; i < kNumSystemFontsForFontconfig; ++i) {
     base::FilePath path(kSystemFontsForFontconfig[i]);
-    if (base::strcasecmp(path.BaseName().value().c_str(), basename.c_str()) ==
-        0)
+    if (base::EqualsCaseInsensitiveASCII(path.BaseName().value(), basename))
       return LoadFontIntoFontconfig(path);
   }
   LOG(ERROR) << "Unable to find system font named " << basename;
   return false;
 }
 
 bool LoadConfigFileIntoFontconfig(const base::FilePath& path) {
   // Unlike other FcConfig functions, FcConfigParseAndLoad() doesn't default to
   // the current config when passed NULL. So that's cool.
   if (!FcConfigParseAndLoad(FcConfigGetCurrent(),
@@ skipping 44 matching lines @@
                                         const std::string& preferred_family) {
   return base::StringPrintf(
       "  <alias>\n"
       "    <family>%s</family>\n"
       "    <prefer><family>%s</family></prefer>\n"
       "  </alias>\n",
       original_family.c_str(), preferred_family.c_str());
 }
 
 }  // namespace gfx