linux and chromeos: Turn on -Wunused-const-variable.

chrome/browser/chromeos/input_method/input_method_manager_impl.cc

 // 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.
 
 #include "chrome/browser/chromeos/input_method/input_method_manager_impl.h"
 
 #include <algorithm>  // std::find
 
 #include "base/basictypes.h"
 #include "base/bind.h"
@@ skipping 14 matching lines @@
 #include "chromeos/ime/input_method_delegate.h"
 #include "chromeos/ime/xkeyboard.h"
 #include "third_party/icu/source/common/unicode/uloc.h"
 #include "ui/base/accelerators/accelerator.h"
 
 namespace chromeos {
 namespace input_method {
 
 namespace {
 
-const char nacl_mozc_us_id[] =
-    "_comp_ime_fpfbhcjppmaeaijcidgiibchfbnhbeljnacl_mozc_us";
 const char nacl_mozc_jp_id[] =
     "_comp_ime_fpfbhcjppmaeaijcidgiibchfbnhbeljnacl_mozc_jp";
 
 bool Contains(const std::vector<std::string>& container,
               const std::string& value) {
   return std::find(container.begin(), container.end(), value) !=
       container.end();
 }
 
 }  // namespace
@@ skipping 817 matching lines @@
   else
     DVLOG(1) << "Failed to initialize the candidate window controller";
 }
 
 bool InputMethodManagerImpl::IsIBusConnectionAlive() {
   return DBusThreadManager::Get() && DBusThreadManager::Get()->GetIBusClient();
 }
 
 }  // namespace input_method
 }  // namespace chromeos