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

content/public/browser/site_instance.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_SITE_INSTANCE_H_
 #define CONTENT_PUBLIC_BROWSER_SITE_INSTANCE_H_
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
@@ skipping 116 matching lines @@
   // Return whether both URLs are part of the same web site, for the purpose of
   // assigning them to processes accordingly.  The decision is currently based
   // on the registered domain of the URLs (google.com, bbc.co.uk), as well as
   // the scheme (https, http).  This ensures that two pages will be in
   // the same process if they can communicate with other via JavaScript.
   // (e.g., docs.google.com and mail.google.com have DOM access to each other
   // if they both set their document.domain properties to google.com.)
   static bool IsSameWebSite(content::BrowserContext* browser_context,
                             const GURL& url1, const GURL& url2);
 
+  // Returns the site for the given URL, which includes only the scheme and
+  // registered domain.  Returns an empty GURL if the URL has no host.
+  static GURL GetSiteForURL(BrowserContext* context, const GURL& url);
+
  protected:
   friend class base::RefCounted<SiteInstance>;
 
   SiteInstance() {}
   virtual ~SiteInstance() {}
 };
 
 }  // namespace content.
 
 #endif  // CONTENT_PUBLIC_BROWSER_SITE_INSTANCE_H_