Add mp4 key rotation test files

media/test/data/README

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 bear-320x240.webm - WebM encode of bear.1280x720.mp4 resized to 320x240.
 bear-vp9.webm - VP9 video only WebM file.
 bear-vp9-opus.webm - VP9 Video with Opus Audio.
 bear-vp8-webvtt.webm - WebM VP8 video with WebVTT subtitle track.
 bear-vp8a.webm - WebM VP8 video with alpha channel.
 bear-vp8a-odd-dimensions.webm - WebM VP8 video with alpha channel and odd dimensions.
@@ skipping 18 matching lines @@
 
 Vorbis test data from bear.ogv (44100 Hz, 16 bits, stereo)
 vorbis-extradata - Vorbis extradata section
 vorbis-packet-0  - timestamp: 0ms, duration: 0ms
 vorbis-packet-1  - timestamp: 0ms, duration: 0ms
 vorbis-packet-2  - timestamp: 0ms, duration: 0ms
 vorbis-packet-3  - timestamp: 2902ms, duration: 0ms
 
 // Encrypted Files
 bear-1280x720-a_frag-cenc.mp4 - A fragmented MP4 version of the audio track of bear-1280x720.mp4 encrypted (ISO CENC) using key ID [1] and key [2].
+bear-1280x720-a_frag-cenc-key_rotation.mp4 - A fragmented MP4 version of the audio track of bear-1280x720.mp4 encrypted (ISO CENC) using key ID [1] and key [2] with key rotation [3].
 bear-1280x720-a_frag-cenc_clear-all.mp4 - Same as bear-1280x720-a_frag-cenc.mp4 but no fragments are encrypted.
 bear-1280x720-v_frag-cenc.mp4 - A fragmented MP4 version of the video track of bear-1280x720.mp4 encrypted (ISO CENC) using key ID [1] and key [2].
+bear-1280x720-v_frag-cenc-key_rotation.mp4 - A fragmented MP4 version of the video track of bear-1280x720.mp4 encrypted (ISO CENC) using key ID [1] and key [2] with key rotation [3].
 bear-1280x720-v_frag-cenc_clear-all.mp4 - Same as bear-1280x720-v_frag-cenc.mp4 but no fragments are encrypted.
 bear-1280x720-a_frag-cenc_missing-saiz-saio.mp4 - An invalid file similar to bear-1280x720-a_frag-cenc.mp4 but has no saiz and saio boxes. To save space, it has only one encrypted sample.
 bear-320x240-16x9-aspect-av_enc-av.webm - bear-320x240-16x9-aspect.webm with audio & video encrypted using key ID [1] and key [2]
 bear-320x240-av_enc-av.webm - bear-320x240.webm with audio & video encrypted using key ID [1] and key [2].
 bear-320x240-av_enc-av_clear-1s.webm - Same as bear-320x240-av_enc-av.webm but with no frames in the first second encrypted.
 bear-320x240-av_enc-av_clear-all.webm - Same as bear-320x240-av_enc-av.webm but with no frames encrypted.
 bear-640x360-av_enc-av.webm - bear-640x360.webm with audio & video encrypted using key ID [1] and key [2].
 bear-640x360-a_frag-cenc.mp4 - A fragmented MP4 version of the audio track of bear-640x360.mp4 encrypted (ISO CENC) using key ID [1] and key [2].
+bear-640x360-a_frag-cenc-key_rotation.mp4 - A fragmented MP4 version of the audio track of bear-640x360.mp4 encrypted (ISO CENC) using key ID [1] and key [2] with key rotation [3].
 bear-640x360-v_frag-cenc.mp4 - A fragmented MP4 version of the video track of bear-640x360.mp4 encrypted (ISO CENC) using key ID [1] and key [2].
+bear-640x360-v_frag-cenc-key_rotation.mp4 - A fragmented MP4 version of the video track of bear-640x360.mp4 encrypted (ISO CENC) using key ID [1] and key [2] with key rotation [3].
 
 [1] 30313233343536373839303132333435
 [2] ebdd62f16814d27b68ef122afce4ae3c
+[3] KeyIds and Keys are created by left rotating key ID [1] and key [2] using
+    std::rotate for every new crypto period. This is only for testing. The
+    actual key rotation algorithm is often much more complicated.
 
 // Container Tests (additional containers derived from bear.ogv)
 bear.ac3    -- created using "avconv -i bear.ogv -f ac3 -b 192k bear.ac3".
 bear.adts   -- created using "avconv -i bear.ogv -f adts -strict experimental bear.adts".
 bear.aiff   -- created using "avconv -i bear.ogv -f aiff bear.aiff".
 bear.asf    -- created using "avconv -i bear.ogv -f asf bear.asf".
 bear.avi    -- created using "avconv -i bear.ogv -f avi -b 192k bear.avi".
 bear.eac3   -- created using "avconv -i bear.ogv -f eac3 bear.eac3".
 bear.flac   -- created using "avconv -i bear.ogv -f flac bear.flac".
 bear.flv    -- created using "avconv -i bear.ogv -f flv bear.flv".
@@ skipping 67 matching lines @@
   ffmpeg -i red-green.mp4 -vcodec copy -vbsf h264_mp4toannexb \
       -an red-green.h264
 
 red-green.h264.md5:
   MD5s of RGB thumbnail rendered version of red-green.h264 decoded with Intel
   VAAPI on Ivy Bridge and Sandy Bridge and V4L2VDA on Exynos.
   Written out by video_decode_accelerator_unittest.
   These differ between implementations because color space-converted frames are
   not specified to the last bit and GLES shader/texture filtering
   precision varies.