chrome: Cleanup class/struct forward declarations

chrome/browser/chromeos/input_method/input_method_manager_impl.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_MANAGER_IMPL_H_
 #define CHROME_BROWSER_CHROMEOS_INPUT_METHOD_INPUT_METHOD_MANAGER_IMPL_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 12 matching lines @@
 #include "ui/base/ime/chromeos/input_method_whitelist.h"
 #include "ui/base/ime/ime_engine_handler_interface.h"
 
 namespace ui {
 class IMEEngineHandlerInterface;
 }  // namespace ui
 
 namespace chromeos {
 class ComponentExtensionIMEManager;
 class ComponentExtensionIMEManagerDelegate;
-class InputMethodEngine;
 namespace input_method {
 class InputMethodDelegate;
 class ImeKeyboard;
 
 // The implementation of InputMethodManager.
 class InputMethodManagerImpl : public InputMethodManager,
                                public CandidateWindowController::Observer,
                                public UserAddingScreen::Observer {
  public:
   class StateImpl : public InputMethodManager::State {
@@ skipping 254 matching lines @@
   typedef std::map<Profile*, EngineMap, ProfileCompare> ProfileEngineMap;
   ProfileEngineMap engine_map_;
 
   DISALLOW_COPY_AND_ASSIGN(InputMethodManagerImpl);
 };
 
 }  // namespace input_method
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_INPUT_METHOD_INPUT_METHOD_MANAGER_IMPL_H_