Disable AnnexB validation for encrypted content.

BUG=372617

Review URL: https://codereview.chromium.org/296983006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@272376 0039d316-1c4b-4281-b951-d872f2087c98

media/formats/mp4/mp4_stream_parser.cc

@@ -366,7 +366,8 @@ bool MP4StreamParser::PrepareAVCBuffer(
     RCHECK(AVC::InsertParamSetsAnnexB(avc_config, frame_buf, subsamples));
   }
 
-  DCHECK(AVC::IsValidAnnexB(*frame_buf));
+  // TODO(acolwell): Improve IsValidAnnexB() so it can handle encrypted content.
+  DCHECK(runs_->is_encrypted() || AVC::IsValidAnnexB(*frame_buf));
   return true;
 }