Remove API elements that are no longer in the IME API design document

chrome/browser/extensions/extension_input_module_constants.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
 // Constants used for the input API and the Windows API.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_INPUT_MODULE_CONSTANTS_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_INPUT_MODULE_CONSTANTS_H_
 #pragma once
 
 namespace extension_input_module_constants {
 
 // Keys used in serializing input data & events.
-extern const char kAltKeyKey[];
 extern const char kAnnotationKey[];
 extern const char kAuxiliaryTextKey[];
 extern const char kAuxiliaryTextVisibleKey[];
 extern const char kCandidateIdKey[];
 extern const char kCandidateKey[];
 extern const char kCandidatesKey[];
 extern const char kCheckedKey[];
 extern const char kContextIdKey[];
-extern const char kCtrlKeyKey[];
 extern const char kCursorKey[];
 extern const char kCursorVisibleKey[];
 extern const char kEnabledKey[];
 extern const char kEndKey[];
 extern const char kEngineIdKey[];
-extern const char kIconKey[];
 extern const char kIdKey[];
 extern const char kItemsKey[];
 extern const char kKeyKey[];
 extern const char kLabelKey[];
 extern const char kPageSizeKey[];
 extern const char kParentIdKey[];
 extern const char kPropertiesKey[];
 extern const char kSegmentsKey[];
 extern const char kSelectionEndKey[];
 extern const char kSelectionStartKey[];
-extern const char kShiftKeyKey[];
-extern const char kShortcutKey[];
 extern const char kStartKey[];
 extern const char kStyleDoubleUnderline[];
 extern const char kStyleKey[];
 extern const char kStyleUnderline[];
 extern const char kTextKey[];
 extern const char kVerticalKey[];
 extern const char kVisibleKey[];
 
 };  // namespace extension_input_module_constants
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_INPUT_MODULE_CONSTANTS_H_