Show apps protecting local data in chrome://settings/cookies.

chrome/browser/extensions/extension_special_storage_policy.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 CHROME_BROWSER_EXTENSIONS_EXTENSION_SPECIAL_STORAGE_POLICY_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_SPECIAL_STORAGE_POLICY_H_
 #pragma once
 
 #include <map>
 #include <string>
 
 #include "base/synchronization/lock.h"
+#include "chrome/common/extensions/extension_set.h"
 #include "googleurl/src/gurl.h"
 #include "webkit/quota/special_storage_policy.h"
 
 class CookieSettings;
 
 namespace extensions {
 class Extension;
 }
 
 // Special rights are granted to 'extensions' and 'applications'. The
@@ skipping 12 matching lines @@
   virtual bool HasSessionOnlyOrigins() OVERRIDE;
 
   // Methods used by the ExtensionService to populate this class.
   void GrantRightsForExtension(const extensions::Extension* extension);
   void RevokeRightsForExtension(const extensions::Extension* extension);
   void RevokeRightsForAllExtensions();
 
   // Decides whether the storage for |extension|'s web extent needs protection.
   bool NeedsProtection(const extensions::Extension* extension);
 
+  // Returns the set of extensions protecting this origin. The caller does not
+  // take ownership of the return value.
+  const ExtensionSet* ExtensionsProtectingOrigin(const GURL& origin);
+
  protected:
   virtual ~ExtensionSpecialStoragePolicy();
 
  private:
   class SpecialCollection {
    public:
     SpecialCollection();
     ~SpecialCollection();
 
     bool Contains(const GURL& origin);
+    const ExtensionSet* ExtensionsContaining(const GURL& origin);
     bool ContainsExtension(const std::string& extension_id);
     void Add(const extensions::Extension* extension);
     void Remove(const extensions::Extension* extension);
     void Clear();
 
    private:
-    typedef std::map<GURL, bool> CachedResults;
-    typedef std::map<std::string, scoped_refptr<const extensions::Extension> >
-        Extensions;
-    Extensions extensions_;
+    typedef std::map<GURL, ExtensionSet*> CachedResults;
+
+    void ClearCache();
+
+    ExtensionSet extensions_;
     CachedResults cached_results_;
   };
 
   void NotifyChanged();
 
   base::Lock lock_;  // Synchronize all access to the collections.
   SpecialCollection protected_apps_;
   SpecialCollection unlimited_extensions_;
   SpecialCollection file_handler_extensions_;
   scoped_refptr<CookieSettings> cookie_settings_;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_SPECIAL_STORAGE_POLICY_H_