Add a preference to clear plugin data on browser shutdown.

chrome/common/pref_names.h

 // Copyright (c) 2010 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 194 matching lines @@
 extern const char kDesktopNotificationDefaultContentSetting[];
 extern const char kDesktopNotificationAllowedOrigins[];
 extern const char kDesktopNotificationDeniedOrigins[];
 extern const char kDefaultContentSettings[];
 extern const char kPerHostContentSettings[];  // OBSOLETE
 extern const char kContentSettingsVersion[];
 extern const char kContentSettingsPatterns[];
 extern const char kBlockThirdPartyCookies[];
 extern const char kBlockNonsandboxedPlugins[];
 extern const char kClearSiteDataOnExit[];
+extern const char kClearPluginLSODataOnExit[];
 extern const char kDefaultZoomLevel[];
 extern const char kPerHostZoomLevels[];
 extern const char kAutoFillEnabled[];
 extern const char kAutoFillAuxiliaryProfilesEnabled[];
 extern const char kAutoFillDialogPlacement[];
 extern const char kAutoFillPositiveUploadRate[];
 extern const char kAutoFillNegativeUploadRate[];
 extern const char kAutoFillPersonalDataManagerFirstRun[];
 
 extern const char kUseVerticalTabs[];
@@ skipping 200 matching lines @@
 extern const char kEnableAuthNegotiatePort[];
 extern const char kAuthServerWhitelist[];
 extern const char kAuthNegotiateDelegateWhitelist[];
 extern const char kGSSAPILibraryName[];
 
 extern const char kKnownBackgroundPages[];
 
 }  // namespace prefs
 
 #endif  // CHROME_COMMON_PREF_NAMES_H_