Fix mistakenly non-const variable.

chrome/common/pref_names.h

 // Copyright (c) 2011 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 for the names of various preferences, for easier changing.
 
 #ifndef CHROME_COMMON_PREF_NAMES_H_
 #define CHROME_COMMON_PREF_NAMES_H_
 #pragma once
 
@@ skipping 38 matching lines @@
 extern const char kWebKitFantasyFontFamily[];
 extern const char kWebKitStandardFontFamilyMap[];
 extern const char kWebKitFixedFontFamilyMap[];
 extern const char kWebKitSerifFontFamilyMap[];
 extern const char kWebKitSansSerifFontFamilyMap[];
 extern const char kWebKitCursiveFontFamilyMap[];
 extern const char kWebKitFantasyFontFamilyMap[];
 
 // ISO 15924 four-letter script codes that per-script font prefs are supported
 // for.
-extern const char* kWebKitScriptsForFontFamilyMaps[];
+extern const char* const kWebKitScriptsForFontFamilyMaps[];
 extern const size_t kWebKitScriptsForFontFamilyMapsLength;
 
 // Per-script font prefs that have defaults, for easy reference when registering
 // the defaults.
 extern const char kWebKitStandardFontFamilyArabic[];
 extern const char kWebKitFixedFontFamilyArabic[];
 extern const char kWebKitSerifFontFamilyArabic[];
 extern const char kWebKitSansSerifFontFamilyArabic[];
 extern const char kWebKitStandardFontFamilyJapanese[];
 extern const char kWebKitFixedFontFamilyJapanese[];
@@ skipping 553 matching lines @@
 
 extern const char kDevicePolicyRefreshRate[];
 extern const char kUserPolicyRefreshRate[];
 
 extern const char kRecoveryComponentVersion[];
 extern const char kComponentUpdaterState[];
 
 }  // namespace prefs
 
 #endif  // CHROME_COMMON_PREF_NAMES_H_