Update some uses of char16 to use the base:: namespace.

ui/base/l10n/l10n_util_unittest.cc

Index: ui/base/l10n/l10n_util_unittest.cc
diff --git a/ui/base/l10n/l10n_util_unittest.cc b/ui/base/l10n/l10n_util_unittest.cc
index ef530fa4e48458c37c121bd5b369a4f98eec60d8..caf8184c56d6bc1f6e1252868f0b530d7c4aabd4 100644
--- a/ui/base/l10n/l10n_util_unittest.cc
+++ b/ui/base/l10n/l10n_util_unittest.cc
@@ -332,7 +332,7 @@ void CheckUiDisplayNameForLocale(const std::string& locale,
 
   bool rtl_direction = true;
   for (size_t i = 0; i < result.length() - 1; i++) {
-    char16 ch = result.at(i);
+    base::char16 ch = result.at(i);
     switch (ch) {
     case base::i18n::kLeftToRightMark:
     case base::i18n::kLeftToRightEmbeddingMark:
@@ -388,7 +388,7 @@ TEST_F(L10nUtilTest, GetDisplayNameForLocale) {
 
   // ToUpper and ToLower should work with embedded NULLs.
   const size_t length_with_null = 4;
-  char16 buf_with_null[length_with_null] = { 0, 'a', 0, 'b' };
+  base::char16 buf_with_null[length_with_null] = { 0, 'a', 0, 'b' };
   base::string16 string16_with_null(buf_with_null, length_with_null);
 
   base::string16 upper_with_null = base::i18n::ToUpper(string16_with_null);