Remove the close button in context menu for IME menu.

chrome/common/extensions/extension_constants.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_COMMON_EXTENSIONS_EXTENSION_CONSTANTS_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_CONSTANTS_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 232 matching lines @@
 extern const char kAppStateCannotRun[];
 extern const char kAppStateReadyToRun[];
 
 // The path part of the file system url used for media file systems.
 extern const char kMediaFileSystemPathPart[];
 
 // The key used for signing some pieces of data from the webstore.
 extern const uint8_t kWebstoreSignaturesPublicKey[];
 extern const int kWebstoreSignaturesPublicKeySize;
 
+#if defined(OS_CHROMEOS)
+// Returns true if |extension_id| is one of the IME extensions that will create
+// IME menu.
+bool IsImeMenuExtensionId(const std::string& extension_id);
+#endif
 }  // namespace extension_misc
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_CONSTANTS_H_