Roll ffmpeg DEPs for security fixes. Add regression tests.

media/ffmpeg/ffmpeg_regression_tests.cc

Index: media/ffmpeg/ffmpeg_regression_tests.cc
diff --git a/media/ffmpeg/ffmpeg_regression_tests.cc b/media/ffmpeg/ffmpeg_regression_tests.cc
index 265c4dd773354c3c0a1daec383a940f9c66180b0..57e392ec802211b9c98f957dc75b4bafff6962d0 100644
--- a/media/ffmpeg/ffmpeg_regression_tests.cc
+++ b/media/ffmpeg/ffmpeg_regression_tests.cc
@@ -135,6 +135,15 @@ FFMPEG_TEST_CASE(Cr275590,
                  "security/275590.m4a",
                  DECODER_ERROR_NOT_SUPPORTED,
                  DEMUXER_ERROR_COULD_NOT_OPEN);
+FFMPEG_TEST_CASE(Cr444522, "security/444522.mp4", PIPELINE_OK, PIPELINE_OK);
+FFMPEG_TEST_CASE(Cr444539,
+                 "security/444539.m4a",
+                 DEMUXER_ERROR_COULD_NOT_OPEN,
+                 DEMUXER_ERROR_COULD_NOT_OPEN);
+FFMPEG_TEST_CASE(Cr444546,
+                 "security/444546.mp4",
+                 DEMUXER_ERROR_COULD_NOT_OPEN,
+                 DEMUXER_ERROR_COULD_NOT_OPEN);
 
 // General MP4 test cases.
 FFMPEG_TEST_CASE(MP4_0,