Remove calls to deprecated MessageLoop methods in media.

media/audio/audio_output_device_unittest.cc

Index: media/audio/audio_output_device_unittest.cc
diff --git a/media/audio/audio_output_device_unittest.cc b/media/audio/audio_output_device_unittest.cc
index 3fe5b01d58e217fd0a36edc105d58593047f3157..11fada47a41eddb44253813797bac73577c0ecaa 100644
--- a/media/audio/audio_output_device_unittest.cc
+++ b/media/audio/audio_output_device_unittest.cc
@@ -14,6 +14,7 @@
 #include "base/memory/shared_memory.h"
 #include "base/message_loop/message_loop.h"
 #include "base/process/process_handle.h"
+#include "base/single_thread_task_runner.h"
 #include "base/sync_socket.h"
 #include "base/task_runner.h"
 #include "base/test/test_timeouts.h"
@@ -245,8 +246,9 @@ void AudioOutputDeviceTest::ExpectRenderCallback() {
 
 void AudioOutputDeviceTest::WaitUntilRenderCallback() {
   // Don't hang the test if we never get the Render() callback.
-  io_loop_.PostDelayedTask(FROM_HERE, base::MessageLoop::QuitWhenIdleClosure(),
-                           TestTimeouts::action_timeout());
+  io_loop_.task_runner()->PostDelayedTask(
+      FROM_HERE, base::MessageLoop::QuitWhenIdleClosure(),
+      TestTimeouts::action_timeout());
   io_loop_.Run();
 }