Remove use of deprecated MessageLoop methods in ui.

ui/message_center/message_center_impl_unittest.cc

Index: ui/message_center/message_center_impl_unittest.cc
diff --git a/ui/message_center/message_center_impl_unittest.cc b/ui/message_center/message_center_impl_unittest.cc
index a87a20efc9d09131e802cdd163e58e1d4a016e81..9afe1bd119035a1e84872513b356cae5c365adfc 100644
--- a/ui/message_center/message_center_impl_unittest.cc
+++ b/ui/message_center/message_center_impl_unittest.cc
@@ -7,11 +7,14 @@
 #include <utility>
 
 #include "base/bind.h"
+#include "base/location.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
+#include "base/single_thread_task_runner.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/canvas.h"
@@ -235,7 +238,7 @@ class MockPopupTimersController : public PopupTimersController {
   ~MockPopupTimersController() override {}
 
   void TimerFinished(const std::string& id) override {
-    base::MessageLoop::current()->PostTask(FROM_HERE, quit_closure_);
+    base::ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE, quit_closure_);
     timer_finished_ = true;
     last_id_ = id;
   }