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

content/public/browser/browser_context.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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_BROWSER_CONTEXT_H_
 #define CONTENT_PUBLIC_BROWSER_BROWSER_CONTEXT_H_
 
 #include "base/callback_forward.h"
 #include "base/hash_tables.h"
 #include "base/supports_user_data.h"
@@ skipping 34 matching lines @@
 
   static content::StoragePartition* GetStoragePartition(
       BrowserContext* browser_context, SiteInstance* site_instance);
   static content::StoragePartition* GetStoragePartitionForSite(
       BrowserContext* browser_context, const GURL& site);
   static void ForEachStoragePartition(
       BrowserContext* browser_context,
       const StoragePartitionCallback& callback);
   static void AsyncObliterateStoragePartition(
       BrowserContext* browser_context,
-      const GURL& site);
+      const GURL& site,
+      const base::Closure& on_gc_required);
+
+  // This function clears the contents of |active_paths| but does not take
+  // ownership of the pointer.
+  //
+  // TODO(ajwong): Don't hide the malloc via this API.
+  static void GarbageCollectStoragePartitions(
+      BrowserContext* browser_context,
+      base::hash_set<FilePath>* active_paths,
+      const base::Closure& done);
 
   // DON'T USE THIS. GetDefaultStoragePartition() is going away.
   // Use GetStoragePartition() instead. Ask ajwong@ if you have problems.
   static content::StoragePartition* GetDefaultStoragePartition(
       BrowserContext* browser_context);
 
   // Ensures that the corresponding ResourceContext is initialized. Normally the
   // BrowserContext initializs the corresponding getters when its objects are
   // created, but if the embedder wants to pass the ResourceContext to another
   // thread before they use BrowserContext, they should call this to make sure
@@ skipping 77 matching lines @@
 struct hash<content::BrowserContext*> {
   std::size_t operator()(content::BrowserContext* const& p) const {
     return reinterpret_cast<std::size_t>(p);
   }
 };
 
 }  // namespace BASE_HASH_NAMESPACE
 #endif
 
 #endif  // CONTENT_PUBLIC_BROWSER_BROWSER_CONTEXT_H_