Fix the loading of ca@valencia.pak, which is available in

base/i18n/rtl.cc

 // Copyright (c) 2011 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 "base/i18n/rtl.h"
 
 #include "base/file_path.h"
 #include "base/logging.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "base/sys_string_conversions.h"
 #include "unicode/coll.h"
 #include "unicode/locid.h"
 #include "unicode/uchar.h"
 #include "unicode/uscript.h"
 
 #if defined(TOOLKIT_USES_GTK)
 #include <gtk/gtk.h>
 #endif
 
 namespace {
 
-// Extract language and country, ignore keywords, concatenate using dash.
+// Extract language, country and variant, but ignore keywords.  For example,
+// en-US, ca@valencia, ca-ES@valencia.
 std::string GetLocaleString(const icu::Locale& locale) {
   const char* language = locale.getLanguage();
   const char* country = locale.getCountry();
+  const char* variant = locale.getVariant();
 
   std::string result =
       (language != NULL && *language != '\0') ? language : "und";
 
   if (country != NULL && *country != '\0') {
     result += '-';
     result += country;
   }
 
+  if (variant != NULL && *variant != '\0') {
+    std::string variant_str(variant);
+    StringToLowerASCII(&variant_str);
+    result += '@' + variant_str;
+  }
+
   return result;
 }
 
 }  // namespace
 
 namespace base {
 namespace i18n {
 
 // Represents the locale-specific ICU text direction.
 static TextDirection g_icu_text_direction = UNKNOWN_DIRECTION;
@@ skipping 258 matching lines @@
       begin == kRightToLeftOverride)
     ++begin_index;
   size_t end_index = text.length() - 1;
   if (text[end_index] == kPopDirectionalFormatting)
     --end_index;
   return text.substr(begin_index, end_index - begin_index + 1);
 }
 
 }  // namespace i18n
 }  // namespace base