Fix chromium-style compile error that got in the tree since yesterday.

chrome/browser/extensions/extension_special_storage_policy.h

 // Copyright (c) 2011 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 <set>
 
 #include "base/synchronization/lock.h"
 #include "googleurl/src/gurl.h"
 #include "webkit/quota/special_storage_policy.h"
 
 class Extension;
 
 // Special rights are granted to 'extensions' and 'applications'. The
 // storage subsystems and the browsing data remover query this interface
 // to determine which origins have these rights.
 class ExtensionSpecialStoragePolicy : public quota::SpecialStoragePolicy {
  public:
+  ExtensionSpecialStoragePolicy();
+
   // SpecialStoragePolicy methods used by storage subsystems and the browsing
   // data remover. These methods are safe to call on any thread.
   virtual bool IsStorageProtected(const GURL& origin);
   virtual bool IsStorageUnlimited(const GURL& origin);
 
   // Methods used by the ExtensionService to populate this class.
   void GrantRightsForExtension(const Extension* extension);
   void RevokeRightsForExtension(const Extension* extension);
   void RevokeRightsForAllExtensions();
 
  private:
+  friend class base::RefCountedThreadSafe<SpecialStoragePolicy>;
+  virtual ~ExtensionSpecialStoragePolicy();
+
   class SpecialCollection {
    public:
+    SpecialCollection();
+    ~SpecialCollection();
+
     bool Contains(const GURL& origin);
     void Add(const Extension* extension);
     void Remove(const Extension* extension);
     void Clear();
 
    private:
     typedef std::map<GURL, bool> CachedResults;
     typedef std::set<const Extension*> Extensions;
     Extensions extensions_;
     CachedResults cached_resuts_;
   };
 
   base::Lock lock_;  // Synchronize all access to the collections.
   SpecialCollection protected_apps_;
   SpecialCollection unlimited_extensions_;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_SPECIAL_STORAGE_POLICY_H_