Support HLS MPEG2 TS with SAMPLE-AES encryption.

media/test/data/README

Index: media/test/data/README
diff --git a/media/test/data/README b/media/test/data/README
index 6f272507d22a29b6f7634e708d9b4052839059b6..408cb08f9ac4f68b2268272b8e87b88dac5d8226 100644
--- a/media/test/data/README
+++ b/media/test/data/README
@@ -74,6 +74,11 @@ bear-640x360-v_frag-cenc-key_rotation.mp4 - A fragmented MP4 version of the vide
 bear-a_enc-a.webm - bear-320x240-audio-only.webm encrypted using key ID [1] and key [2].
 frame_size_change-av_enc-v.webm - third_party/WebKit/LayoutTests/media/resources/frame_size_change.webm encrypted using key ID [1] and key [2].
 
+bear-1280x720-hls-sample-aes.ts - This was produced in two stages. bear-1280x720.ts was run through an HLS segmenter tool, resulting in bear-1280x720-hls.ts. This remultiplexed
+                                  and eliminated some material not needed for HLS. The latter was run through the same tool again, this time applying SampleAES encryption. The key
+                                  and IV used are embedded in the initialization segment. (The key id is used as the actual key for the purpose of this test only, to eliminate the
+                                  need to mock key delivery). keyid=
+
 
 [1] 30313233343536373839303132333435
 [2] ebdd62f16814d27b68ef122afce4ae3c