Not creating ClientUsageTracker for unsupported storage type.

webkit/browser/appcache/appcache_quota_client.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 WEBKIT_BROWSER_APPCACHE_APPCACHE_QUOTA_CLIENT_H_
 #define WEBKIT_BROWSER_APPCACHE_APPCACHE_QUOTA_CLIENT_H_
 
 #include <deque>
 #include <map>
 #include <string>
@@ skipping 32 matching lines @@
                               quota::StorageType type,
                               const GetUsageCallback& callback) OVERRIDE;
   virtual void GetOriginsForType(quota::StorageType type,
                                  const GetOriginsCallback& callback) OVERRIDE;
   virtual void GetOriginsForHost(quota::StorageType type,
                                  const std::string& host,
                                  const GetOriginsCallback& callback) OVERRIDE;
   virtual void DeleteOriginData(const GURL& origin,
                                 quota::StorageType type,
                                 const DeletionCallback& callback) OVERRIDE;
+  virtual bool DoesSupport(quota::StorageType type) const OVERRIDE;
 
  private:
   friend class AppCacheService;  // for NotifyAppCacheIsDestroyed
   friend class AppCacheStorageImpl;  // for NotifyAppCacheIsReady
   friend class AppCacheQuotaClientTest;
 
   WEBKIT_STORAGE_BROWSER_EXPORT
       explicit AppCacheQuotaClient(AppCacheService* service);
 
   void DidDeleteAppCachesForOrigin(int rv);
@@ skipping 22 matching lines @@
   AppCacheService* service_;
   bool appcache_is_ready_;
   bool quota_manager_is_destroyed_;
 
   DISALLOW_COPY_AND_ASSIGN(AppCacheQuotaClient);
 };
 
 }  // namespace appcache
 
 #endif  // WEBKIT_BROWSER_APPCACHE_APPCACHE_QUOTA_CLIENT_H_