Extract input_method_whitelist.{h|cc} from c/b/chromeos. (2nd try)

chromeos/ime/input_method_whitelist.h

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Copyright 2013 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_WHITELIST_H_
-#define CHROME_BROWSER_CHROMEOS_INPUT_METHOD_INPUT_METHOD_WHITELIST_H_
+#ifndef CHROMEOS_IME_INPUT_METHOD_WHITELIST_H_
+#define CHROMEOS_IME_INPUT_METHOD_WHITELIST_H_
 
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
+#include "chromeos/chromeos_export.h"
 
 namespace chromeos {
 namespace input_method {
 
 class InputMethodDescriptor;
 typedef std::vector<InputMethodDescriptor> InputMethodDescriptors;
 
-//
-class InputMethodWhitelist {
+// A class which has white listed input method list. The list is generated by
+// gen_input_methods.py from input_methods.txt.
+class CHROMEOS_EXPORT InputMethodWhitelist {
  public:
   InputMethodWhitelist();
   ~InputMethodWhitelist();
 
   // Returns true if |input_method_id| is whitelisted.
   bool InputMethodIdIsWhitelisted(const std::string& input_method_id) const;
 
   // Returns all input methods that are supported, including ones not active.
   // This function never returns NULL. Note that input method extensions are not
   // included in the result.
   scoped_ptr<InputMethodDescriptors> GetSupportedInputMethods() const;
 
  private:
   std::set<std::string> supported_input_methods_;
 
   DISALLOW_COPY_AND_ASSIGN(InputMethodWhitelist);
 };
 
 }  // namespace input_method
 }  // namespace chromeos
 
-#endif  // CHROME_BROWSER_CHROMEOS_INPUT_METHOD_INPUT_METHOD_WHITELIST_H_
+#endif  // CHROMEOS_IME_INPUT_METHOD_WHITELIST_H_