Implement DatabaseQuotaClient's DeteleteOriginData method.

webkit/quota/quota_task.cc

 // 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.
 
 #include "webkit/quota/quota_task.h"
 
 #include <algorithm>
 #include <functional>
 
 #include "base/message_loop.h"
@@ skipping 49 matching lines @@
 QuotaThreadTask::~QuotaThreadTask() {
 }
 
 void QuotaThreadTask::Run() {
   target_message_loop_->PostTask(FROM_HERE, NewRunnableMethod(
       this, &QuotaThreadTask::CallRunOnTargetThread));
 }
 
 void QuotaThreadTask::CallRunOnTargetThread() {
   DCHECK(target_message_loop_->BelongsToCurrentThread());
+  if (RunOnTargetThreadAsync())
+    original_message_loop()->PostTask(
+        FROM_HERE, NewRunnableMethod(this, &QuotaThreadTask::CallCompleted));
+}
+
+bool QuotaThreadTask::RunOnTargetThreadAsync() {
   RunOnTargetThread();
-  original_message_loop()->PostTask(
-      FROM_HERE, NewRunnableMethod(this, &QuotaThreadTask::CallCompleted));
+  return true;
+}
+
+void QuotaThreadTask::RunOnTargetThread() {
 }
 
 // QuotaTaskObserver -------------------------------------------------------
 
 QuotaTaskObserver::~QuotaTaskObserver() {
   std::for_each(running_quota_tasks_.begin(),
                 running_quota_tasks_.end(),
                 std::mem_fun(&QuotaTask::Abort));
 }
 
 QuotaTaskObserver::QuotaTaskObserver() {
 }
 
 void QuotaTaskObserver::RegisterTask(QuotaTask* task) {
   running_quota_tasks_.insert(task);
 }
 
 void QuotaTaskObserver::UnregisterTask(QuotaTask* task) {
   DCHECK(running_quota_tasks_.find(task) != running_quota_tasks_.end());
   running_quota_tasks_.erase(task);
 }
 
 }  // namespace quota