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

ui/gfx/test/fontconfig_util_linux.cc

Index: ui/gfx/test/fontconfig_util_linux.cc
diff --git a/ui/gfx/test/fontconfig_util_linux.cc b/ui/gfx/test/fontconfig_util_linux.cc
index e2f5140b682cf97e926d70e6685cdd10c3317d2f..609a3fca8bdae1d6acdc58557769b65b4ea423fe 100644
--- a/ui/gfx/test/fontconfig_util_linux.cc
+++ b/ui/gfx/test/fontconfig_util_linux.cc
@@ -100,8 +100,7 @@ bool LoadFontIntoFontconfig(const base::FilePath& path) {
 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;