[IME] InputMethodUtil should cache the hardware layouts from VPD, instead of the filtered hardware …

chrome/browser/chromeos/input_method/input_method_util.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_INPUT_METHOD_INPUT_METHOD_UTIL_H_
 #define CHROME_BROWSER_CHROMEOS_INPUT_METHOD_INPUT_METHOD_UTIL_H_
 
 #include <cstddef>
 #include <map>
 #include <string>
@@ skipping 185 matching lines @@
   std::map<std::string, std::string> xkb_layout_to_indicator_;
 
   typedef base::hash_map<std::string, int> HashType;
   HashType english_to_resource_id_;
 
   InputMethodDelegate* delegate_;
 
   base::ThreadChecker thread_checker_;
   std::vector<std::string> hardware_layouts_;
   std::vector<std::string> hardware_login_layouts_;
+  std::vector<std::string> cached_hardware_layouts_;
 
   DISALLOW_COPY_AND_ASSIGN(InputMethodUtil);
 };
 
 }  // namespace input_method
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_INPUT_METHOD_INPUT_METHOD_UTIL_H_