Replace MessageLoopProxy with ThreadTaskRunnerHandle in src/sync/.

sync/tools/sync_listen_notifications.cc

Index: sync/tools/sync_listen_notifications.cc
diff --git a/sync/tools/sync_listen_notifications.cc b/sync/tools/sync_listen_notifications.cc
index e924e537df87b63df0ae27b9badf8677bedc9188..7a3279b63eb43ca34114b6245bd58fedfe8089f4 100644
--- a/sync/tools/sync_listen_notifications.cc
+++ b/sync/tools/sync_listen_notifications.cc
@@ -92,8 +92,8 @@ class MyTestURLRequestContext : public net::TestURLRequestContext {
 class MyTestURLRequestContextGetter : public net::TestURLRequestContextGetter {
  public:
   explicit MyTestURLRequestContextGetter(
-      const scoped_refptr<base::MessageLoopProxy>& io_message_loop_proxy)
-      : TestURLRequestContextGetter(io_message_loop_proxy) {}
+      const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner)
+      : TestURLRequestContextGetter(io_task_runner) {}
 
   virtual net::TestURLRequestContext* GetURLRequestContext() OVERRIDE {
     // Construct |context_| lazily so it gets constructed on the right