Remove calls to MessageLoop(ForUI|ForIO)::Run/RunUntilIdle.

chrome/browser/chromeos/login/ui/captive_portal_window_browsertest.cc

Index: chrome/browser/chromeos/login/ui/captive_portal_window_browsertest.cc
diff --git a/chrome/browser/chromeos/login/ui/captive_portal_window_browsertest.cc b/chrome/browser/chromeos/login/ui/captive_portal_window_browsertest.cc
index e5ff19442a5cc782e65111196e834ea117693ce8..731ddadf0ebd9f36f6c84fadf61521f10452359a 100644
--- a/chrome/browser/chromeos/login/ui/captive_portal_window_browsertest.cc
+++ b/chrome/browser/chromeos/login/ui/captive_portal_window_browsertest.cc
@@ -10,7 +10,9 @@
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "chrome/browser/chromeos/login/login_manager_test.h"
 #include "chrome/browser/chromeos/login/screens/error_screen.h"
 #include "chrome/browser/chromeos/login/screens/network_error_view.h"
@@ -93,9 +95,10 @@ class CaptivePortalWindowTest : public InProcessBrowserTest {
 
   void TearDownOnMainThread() override {
     captive_portal_window_proxy_.reset();
-    base::MessageLoopForUI::current()->task_runner()->DeleteSoon(FROM_HERE,
-                                                                 host_);
-    base::MessageLoopForUI::current()->RunUntilIdle();
+
+    ASSERT_TRUE(base::MessageLoopForUI::IsCurrent());
+    base::ThreadTaskRunnerHandle::Get()->DeleteSoon(FROM_HERE, host_);
+    base::RunLoop().RunUntilIdle();
   }
 
  private: