Fix up SequencedWorkerPool in preparation for making it a TaskRunner

webkit/dom_storage/dom_storage_task_runner.cc

Index: webkit/dom_storage/dom_storage_task_runner.cc
diff --git a/webkit/dom_storage/dom_storage_task_runner.cc b/webkit/dom_storage/dom_storage_task_runner.cc
index 6a1afb5a123f29bba0d3ab8440df06753d4c41df..92bf7a9b4707bd88e7eb324645df8e4f5de010e4 100644
--- a/webkit/dom_storage/dom_storage_task_runner.cc
+++ b/webkit/dom_storage/dom_storage_task_runner.cc
@@ -7,13 +7,14 @@
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/message_loop_proxy.h"
+#include "base/tracked_objects.h"
 
 namespace dom_storage {
 
 // DomStorageTaskRunner
 
 DomStorageTaskRunner::DomStorageTaskRunner(
-    base::MessageLoopProxy* message_loop)
+    const scoped_refptr<base::MessageLoopProxy>& message_loop)
     : message_loop_(message_loop) {
 }
 
@@ -36,8 +37,8 @@ void DomStorageTaskRunner::PostDelayedTask(
 // DomStorageWorkerPoolTaskRunner
 
 DomStorageWorkerPoolTaskRunner::DomStorageWorkerPoolTaskRunner(
-    base::SequencedWorkerPool* sequenced_worker_pool,
-    base::MessageLoopProxy* delayed_task_loop)
+    const scoped_refptr<base::SequencedWorkerPool>& sequenced_worker_pool,
+    const scoped_refptr<base::MessageLoopProxy>& delayed_task_loop)
     : DomStorageTaskRunner(delayed_task_loop),
       sequenced_worker_pool_(sequenced_worker_pool),
       sequence_token_(