Not creating ClientUsageTracker for unsupported storage type.

webkit/browser/appcache/appcache_quota_client.cc

 // 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.
 
 #include "webkit/browser/appcache/appcache_quota_client.h"
 
 #include <algorithm>
 #include <map>
 #include <set>
 
@@ skipping 121 matching lines @@
   current_delete_request_callback_ = callback;
   if (type != quota::kStorageTypeTemporary) {
     DidDeleteAppCachesForOrigin(net::OK);
     return;
   }
 
   service_->DeleteAppCachesForOrigin(
       origin, GetServiceDeleteCallback()->callback());
 }
 
+bool AppCacheQuotaClient::DoesSupport(quota::StorageType type) const {
+  return type == quota::kStorageTypeTemporary;
+}
+
 void AppCacheQuotaClient::DidDeleteAppCachesForOrigin(int rv) {
   DCHECK(service_);
   if (quota_manager_is_destroyed_)
     return;
 
   // Finish the request by calling our callers callback.
   current_delete_request_callback_.Run(NetErrorCodeToQuotaStatus(rv));
   current_delete_request_callback_.Reset();
   if (pending_serial_requests_.empty())
     return;
@@ skipping 85 matching lines @@
     current_delete_request_callback_.Run(quota::kQuotaErrorAbort);
     current_delete_request_callback_.Reset();
     GetServiceDeleteCallback()->Cancel();
   }
 
   if (quota_manager_is_destroyed_)
     delete this;
 }
 
 }  // namespace appcache