Remove calls to deprecated MessageLoop methods in media.

media/blink/webmediaplayer_impl_unittest.cc

Index: media/blink/webmediaplayer_impl_unittest.cc
diff --git a/media/blink/webmediaplayer_impl_unittest.cc b/media/blink/webmediaplayer_impl_unittest.cc
index 3a94a9af25eac7eeb9a5a2fed33c3505fa3b306f..09be196e93d8bcfe0d5fa3a3760602ccf6a08cc1 100644
--- a/media/blink/webmediaplayer_impl_unittest.cc
+++ b/media/blink/webmediaplayer_impl_unittest.cc
@@ -14,6 +14,7 @@
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "media/base/media_log.h"
@@ -115,7 +116,7 @@ class WebMediaPlayerImplTest : public testing::Test {
     // NOTE: This should be done before any other member variables are
     // destructed since WMPI may reference them during destruction.
     wmpi_.reset();
-    message_loop_.RunUntilIdle();
+    base::RunLoop().RunUntilIdle();
 
     web_view_->close();
     web_local_frame_->close();