Not creating ClientUsageTracker for unsupported storage type.

webkit/browser/quota/mock_storage_client.cc

 // Copyright 2013 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/quota/mock_storage_client.h"
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/singleton.h"
@@ skipping 103 matching lines @@
 
 void MockStorageClient::DeleteOriginData(
     const GURL& origin, StorageType type,
     const DeletionCallback& callback) {
   base::MessageLoopProxy::current()->PostTask(
       FROM_HERE,
       base::Bind(&MockStorageClient::RunDeleteOriginData,
                  weak_factory_.GetWeakPtr(), origin, type, callback));
 }
 
+bool MockStorageClient::DoesSupport(quota::StorageType type) const {
+  return true;
+}
+
 void MockStorageClient::RunGetOriginUsage(
     const GURL& origin_url, StorageType type,
     const GetUsageCallback& callback) {
   OriginDataMap::iterator find = origin_data_.find(make_pair(origin_url, type));
   if (find == origin_data_.end()) {
     callback.Run(0);
   } else {
     callback.Run(find->second);
   }
 }
@@ skipping 39 matching lines @@
     int64 delta = itr->second;
     quota_manager_proxy_->
         NotifyStorageModified(id(), origin_url, type, -delta);
     origin_data_.erase(itr);
   }
 
   callback.Run(kQuotaStatusOk);
 }
 
 }  // namespace quota