Add a global on/off switch for content settings and expose a toggle on the Website Settings options…

chrome/common/pref_names.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.
 
 // Constants for the names of various preferences, for easier changing.
 
 #ifndef CHROME_COMMON_PREF_NAMES_H_
 #define CHROME_COMMON_PREF_NAMES_H_
 
 #include <stddef.h>
@@ skipping 304 matching lines @@
 extern const char kPluginsMetadata[];
 extern const char kPluginsResourceCacheUpdate[];
 #endif
 extern const char kCheckDefaultBrowser[];
 extern const char kDefaultBrowserSettingEnabled[];
 #if defined(OS_MACOSX)
 extern const char kShowUpdatePromotionInfoBar[];
 #endif
 extern const char kUseCustomChromeFrame[];
 extern const char kDefaultContentSettings[];
+extern const char kOverrideContentSettings[];
 extern const char kContentSettingsClearOnExitMigrated[];
 extern const char kContentSettingsVersion[];
 extern const char kContentSettingsPatternPairs[];
 extern const char kContentSettingsPluginWhitelist[];
 extern const char kBlockThirdPartyCookies[];
 extern const char kClearSiteDataOnExit[];
 extern const char kDefaultZoomLevel[];
 extern const char kPerHostZoomLevels[];
 extern const char kAutofillDialogAutofillDefault[];
 extern const char kAutofillDialogPayWithoutWallet[];
@@ skipping 485 matching lines @@
 extern const char kPartnerBookmarkMappings[];
 #endif
 
 extern const char kQuickCheckEnabled[];
 extern const char kBrowserGuestModeEnabled[];
 extern const char kBrowserAddPersonEnabled[];
 
 }  // namespace prefs
 
 #endif  // CHROME_COMMON_PREF_NAMES_H_