Ensure DiscardPadding is parsed as a signed integer.

content/browser/media/media_browsertest.cc

Index: content/browser/media/media_browsertest.cc
diff --git a/content/browser/media/media_browsertest.cc b/content/browser/media/media_browsertest.cc
index e7af9ae07671cb08be92ccad9b058d98cf50e281..f284add4de5141d92cdbccc7c8a42dfbc255e22a 100644
--- a/content/browser/media/media_browsertest.cc
+++ b/content/browser/media/media_browsertest.cc
@@ -109,10 +109,9 @@ IN_PROC_BROWSER_TEST_P(MediaTest, VideoBearWebm) {
   PlayVideo("bear.webm", GetParam());
 }
 
-// TODO(dalecurtis): Disabled while the test data file is updated.
-// IN_PROC_BROWSER_TEST_P(MediaTest, VideoBearOpusWebm) {
-//   PlayVideo("bear-opus.webm", GetParam());
-// }
+IN_PROC_BROWSER_TEST_P(MediaTest, VideoBearOpusWebm) {
+  PlayVideo("bear-opus.webm", GetParam());
+}
 
 IN_PROC_BROWSER_TEST_P(MediaTest, VideoBearOpusOgg) {
   PlayVideo("bear-opus.ogg", GetParam());