Revert of Buffer 2 seconds of data in the ffmpeg demuxer.

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 24b97737f88f54b297dd57c87a20d1f345552f24..d0a7d1a2565d94d598310d1952984f73171272b7 100644
--- a/media/filters/ffmpeg_demuxer_unittest.cc
+++ b/media/filters/ffmpeg_demuxer_unittest.cc
@@ -473,7 +473,7 @@
   audio->Read(NewReadCB(FROM_HERE, 27, 3000, true));
   base::RunLoop().Run();
 
-  EXPECT_EQ(166866, demuxer_->GetMemoryUsage());
+  EXPECT_EQ(22084, demuxer_->GetMemoryUsage());
 }
 
 TEST_F(FFmpegDemuxerTest, Read_Video) {
@@ -490,7 +490,7 @@
   video->Read(NewReadCB(FROM_HERE, 1057, 33000, false));
   base::RunLoop().Run();
 
-  EXPECT_EQ(148778, demuxer_->GetMemoryUsage());
+  EXPECT_EQ(323, demuxer_->GetMemoryUsage());
 }
 
 TEST_F(FFmpegDemuxerTest, Read_Text) {