Garbage Collect the Storage directory on next profile start after an extension uninstall.

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 524 matching lines @@
 
 extern const char kLastExtensionsUpdateCheck[];
 extern const char kNextExtensionsUpdateCheck[];
 
 extern const char kExtensionAllowedInstallSites[];
 extern const char kExtensionInstallAllowList[];
 extern const char kExtensionInstallDenyList[];
 extern const char kExtensionAlertsInitializedPref[];
 extern const char kExtensionInstallForceList[];
 extern const char kExtensionBlacklistUpdateVersion[];
+extern const char kExtensionStorageGarbageCollect[];
 
 extern const char kNtpTipsResourceServer[];
 
 extern const char kNtpCollapsedForeignSessions[];
 extern const char kNtpMostVisitedURLsBlacklist[];
 extern const char kNtpPromoResourceCacheUpdate[];
 extern const char kNtpDateResourceServer[];
 extern const char kNtpShownBookmarksFolder[];
 extern const char kNtpShownPage[];
 extern const char kNtpPromoDesktopSessionFound[];
@@ skipping 246 matching lines @@
 
 extern const char kLastPolicyStatisticsUpdate[];
 
 #if defined(OS_CHROMEOS)
 extern const char kRLZBrand[];
 #endif
 
 }  // namespace prefs
 
 #endif  // CHROME_COMMON_PREF_NAMES_H_