Revert of Remove some legacy versions of StartsWith and EndsWith.

ui/base/l10n/l10n_util.cc

Index: ui/base/l10n/l10n_util.cc
diff --git a/ui/base/l10n/l10n_util.cc b/ui/base/l10n/l10n_util.cc
index 010dbde790b489a65d82e7bfd62e39299905b3db..de0e62010a4dfb5b995707a9d5d4afbd305c8389 100644
--- a/ui/base/l10n/l10n_util.cc
+++ b/ui/base/l10n/l10n_util.cc
@@ -201,9 +201,8 @@
   };
 
   // Skip all the es_Foo other than es_419 for now.
-  if (base::StartsWith(locale_name, "es_",
-                       base::CompareCase::INSENSITIVE_ASCII))
-    return !base::EndsWith(locale_name, "419", base::CompareCase::SENSITIVE);
+  if (base::StartsWithASCII(locale_name, "es_", false))
+    return !base::EndsWith(locale_name, "419", true);
 
   for (size_t i = 0; i < arraysize(kDuplicateNames); ++i) {
     if (base::EqualsCaseInsensitiveASCII(kDuplicateNames[i], locale_name))