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diff --git a/chrome/browser/chromeos/cros/keyboard_library.h b/chrome/browser/chromeos/cros/keyboard_library.h
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+++ b/chrome/browser/chromeos/cros/keyboard_library.h
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+// Copyright (c) 2010 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_CROS_KEYBOARD_LIBRARY_H_
+#define CHROME_BROWSER_CHROMEOS_CROS_KEYBOARD_LIBRARY_H_
+
+#include "third_party/cros/chromeos_keyboard.h"
+
+#include <string>
+
+#include "base/basictypes.h"
+
+namespace chromeos {
+
+// This class handles the interaction with the ChromeOS keyboard library APIs.
+class KeyboardLibrary {
+ public:
+  virtual ~KeyboardLibrary() {}
+
+  // Returns the current layout name like "us". On error, returns "".
+  virtual std::string GetCurrentKeyboardLayoutName() const = 0;
+
+  // Sets the current keyboard layout to |layout_name|.  Returns true on
+  // success.
+  virtual bool SetCurrentKeyboardLayoutByName(
+      const std::string& layout_name) = 0;
+
+  // Gets whehter we have separate keyboard layout per window, or not. The
+  // result is stored in |is_per_window|.  Returns true on success.
+  virtual bool GetKeyboardLayoutPerWindow(bool* is_per_window) const = 0;
+
+  // Sets whether we have separate keyboard layout per window, or not. If false
+  // is given, the same keyboard layout will be shared for all applications.
+  // Returns true on success.
+  virtual bool SetKeyboardLayoutPerWindow(bool is_per_window) = 0;
+};
+
+class KeyboardLibraryImpl : public KeyboardLibrary {
+ public:
+  KeyboardLibraryImpl() {}
+  virtual ~KeyboardLibraryImpl() {}
+
+  // KeyboardLibrary overrides.
+  virtual std::string GetCurrentKeyboardLayoutName() const;
+  virtual bool SetCurrentKeyboardLayoutByName(const std::string& layout_name);
+  virtual bool GetKeyboardLayoutPerWindow(bool* is_per_window) const;
+  virtual bool SetKeyboardLayoutPerWindow(bool is_per_window);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(KeyboardLibraryImpl);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_CROS_KEYBOARD_LIBRARY_H_