Cleanup AppCacheQuotaClient using new Callback

webkit/appcache/appcache_storage_impl.cc

Index: webkit/appcache/appcache_storage_impl.cc
diff --git a/webkit/appcache/appcache_storage_impl.cc b/webkit/appcache/appcache_storage_impl.cc
index bd16ae2155b2c554f38f55a5ee2f7c90d6d5eb47..248b9c3bbe559a3a247a93f1fc3c5d4a5e9a8274 100644
--- a/webkit/appcache/appcache_storage_impl.cc
+++ b/webkit/appcache/appcache_storage_impl.cc
@@ -549,12 +549,10 @@ void AppCacheStorageImpl::StoreGroupAndCacheTask::GetQuotaThenSchedule() {
   }
 
   // We have to ask the quota manager for the value.
-  AddRef();  // balanced in the OnQuotaCallback
   storage_->pending_quota_queries_.insert(this);
   quota_manager->GetUsageAndQuota(
       group_record_.origin, quota::kStorageTypeTemporary,
-      base::Bind(&StoreGroupAndCacheTask::OnQuotaCallback,
-                 base::Unretained(this)));
+      base::Bind(&StoreGroupAndCacheTask::OnQuotaCallback, this));
 }
 
 void AppCacheStorageImpl::StoreGroupAndCacheTask::OnQuotaCallback(
@@ -567,7 +565,6 @@ void AppCacheStorageImpl::StoreGroupAndCacheTask::OnQuotaCallback(
     storage_->pending_quota_queries_.erase(this);
     Schedule();
   }
-  Release();  // balanced in GetQuotaThenSchedule
 }
 
 void AppCacheStorageImpl::StoreGroupAndCacheTask::Run() {