Roll ffmpeg DEPS for security fix.

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 756ec2de0650829e3e95df49414db49d0514db88..c7043b35642a0abfffa1c90105e5db543a3dec67 100644
--- a/media/ffmpeg/ffmpeg_regression_tests.cc
+++ b/media/ffmpeg/ffmpeg_regression_tests.cc
@@ -138,6 +138,10 @@ FFMPEG_TEST_CASE(Cr444546,
                  "security/444546.mp4",
                  DEMUXER_ERROR_COULD_NOT_OPEN,
                  DEMUXER_ERROR_COULD_NOT_OPEN);
+FFMPEG_TEST_CASE(Cr447860,
+                 "security/447860.webm",
+                 PIPELINE_OK,
+                 PIPELINE_OK);
 FFMPEG_TEST_CASE(Cr449958,
                  "security/449958.webm",
                  PIPELINE_OK,
@@ -146,6 +150,10 @@ FFMPEG_TEST_CASE(Cr536601,
                  "security/536601.m4a",
                  PIPELINE_OK,
                  PIPELINE_OK);
+FFMPEG_TEST_CASE(Cr532967,
+                 "security/532967.webm",
+                 PIPELINE_OK,
+                 PIPELINE_OK);
 
 // General MP4 test cases.
 FFMPEG_TEST_CASE(MP4_0,