Remove calls to deprecated MessageLoop methods on Windows and Linux.

base/message_loop/message_loop_task_runner_unittest.cc

Index: base/message_loop/message_loop_task_runner_unittest.cc
diff --git a/base/message_loop/message_loop_task_runner_unittest.cc b/base/message_loop/message_loop_task_runner_unittest.cc
index 3b6475b906959ff74d4c0eae92c26fe955dc35c8..476eae563ea2cba238ac2eae4816afd773cccf06 100644
--- a/base/message_loop/message_loop_task_runner_unittest.cc
+++ b/base/message_loop/message_loop_task_runner_unittest.cc
@@ -37,7 +37,7 @@ class MessageLoopTaskRunnerTest : public testing::Test {
     task_thread_.Start();
 
     // Allow us to pause the |task_thread_|'s MessageLoop.
-    task_thread_.message_loop()->task_runner()->PostTask(
+    task_thread_.task_runner()->PostTask(
         FROM_HERE, Bind(&MessageLoopTaskRunnerTest::BlockTaskThreadHelper,
                         Unretained(this)));
   }