Change webkit/{fileapi,quota} code to use TaskRunner.

webkit/database/database_quota_client.cc

Index: webkit/database/database_quota_client.cc
diff --git a/webkit/database/database_quota_client.cc b/webkit/database/database_quota_client.cc
index f38eb3d380ad4c94001e66c06c5b77975eedb5b1..4e84ee8ae6fbf6beeb196f70b34e08b1658a6ae3 100644
--- a/webkit/database/database_quota_client.cc
+++ b/webkit/database/database_quota_client.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -173,7 +173,7 @@ class DatabaseQuotaClient::DeleteOriginTask : public HelperTask {
   void OnCompletionCallback(int rv) {
     if (rv == net::OK)
       result_ = quota::kQuotaStatusOk;
-    original_message_loop()->PostTask(
+    original_task_runner()->PostTask(
         FROM_HERE, base::Bind(&DeleteOriginTask::CallCompleted, this));
     Release();  // balanced in RunOnTargetThreadAsync
   }