Remove remaining calls to deprecated MessageLoop methods on Mac.

media/filters/ffmpeg_demuxer_unittest.cc

Index: media/filters/ffmpeg_demuxer_unittest.cc
diff --git a/media/filters/ffmpeg_demuxer_unittest.cc b/media/filters/ffmpeg_demuxer_unittest.cc
index 629205bc355d4fea38f7c1bcf71cf4284d6c1078..780876545cd5874846347e7ba037beacc64e4501 100644
--- a/media/filters/ffmpeg_demuxer_unittest.cc
+++ b/media/filters/ffmpeg_demuxer_unittest.cc
@@ -1077,7 +1077,7 @@ TEST_F(FFmpegDemuxerTest, IsValidAnnexB) {
     stream->EnableBitstreamConverter();
 
     stream->Read(base::Bind(&ValidateAnnexB, stream));
-    message_loop_.Run();
+    base::RunLoop().Run();
 
     demuxer_->Stop();
     demuxer_.reset();
@@ -1152,10 +1152,10 @@ TEST_F(FFmpegDemuxerTest, HEVC_in_MP4_container) {
   ASSERT_TRUE(video);
 
   video->Read(NewReadCB(FROM_HERE, 3569, 66733, true));
-  message_loop_.Run();
+  base::RunLoop().Run();
 
   video->Read(NewReadCB(FROM_HERE, 1042, 200200, false));
-  message_loop_.Run();
+  base::RunLoop().Run();
 #else
   InitializeDemuxerAndExpectPipelineStatus(DEMUXER_ERROR_NO_SUPPORTED_STREAMS);
 #endif
@@ -1171,10 +1171,10 @@ TEST_F(FFmpegDemuxerTest, Read_AC3_Audio) {
 
   // Read the first two frames and check that we are getting expected data
   audio->Read(NewReadCB(FROM_HERE, 834, 0, true));
-  message_loop_.Run();
+  base::RunLoop().Run();
 
   audio->Read(NewReadCB(FROM_HERE, 836, 34830, true));
-  message_loop_.Run();
+  base::RunLoop().Run();
 #else
   InitializeDemuxerAndExpectPipelineStatus(DEMUXER_ERROR_NO_SUPPORTED_STREAMS);
 #endif
@@ -1190,10 +1190,10 @@ TEST_F(FFmpegDemuxerTest, Read_EAC3_Audio) {
 
   // Read the first two frames and check that we are getting expected data
   audio->Read(NewReadCB(FROM_HERE, 870, 0, true));
-  message_loop_.Run();
+  base::RunLoop().Run();
 
   audio->Read(NewReadCB(FROM_HERE, 872, 34830, true));
-  message_loop_.Run();
+  base::RunLoop().Run();
 #else
   InitializeDemuxerAndExpectPipelineStatus(DEMUXER_ERROR_NO_SUPPORTED_STREAMS);
 #endif