Remove use of deprecated MessageLoop methods in ui.

ui/gl/gl_context_cgl.cc

Index: ui/gl/gl_context_cgl.cc
diff --git a/ui/gl/gl_context_cgl.cc b/ui/gl/gl_context_cgl.cc
index b799a174716cc2dba13ff71ddbe5f0f0d8633ec8..8c779ea05e30eb746a38b52e096f6fec443d0755 100644
--- a/ui/gl/gl_context_cgl.cc
+++ b/ui/gl/gl_context_cgl.cc
@@ -10,7 +10,10 @@
 #include <memory>
 #include <vector>
 
+#include "base/location.h"
 #include "base/logging.h"
+#include "base/single_thread_task_runner.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "base/trace_event/trace_event.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_implementation.h"
@@ -146,7 +149,7 @@ void GLContextCGL::Destroy() {
     if (base::MessageLoop::current() != nullptr) {
       // Delay releasing the pixel format for 10 seconds to reduce the number of
       // unnecessary GPU switches.
-      base::MessageLoop::current()->PostDelayedTask(
+      base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
           FROM_HERE, base::Bind(&CGLReleasePixelFormat, discrete_pixelformat_),
           base::TimeDelta::FromSeconds(10));
     } else {