Not creating ClientUsageTracker for unsupported storage type.

content/browser/indexed_db/indexed_db_quota_client.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 CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_QUOTA_CLIENT_H_
 #define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_QUOTA_CLIENT_H_
 
 #include <set>
 #include <string>
 
@@ skipping 25 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:
   scoped_refptr<IndexedDBContextImpl> indexed_db_context_;
 
   DISALLOW_COPY_AND_ASSIGN(IndexedDBQuotaClient);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_QUOTA_CLIENT_H_