Roll src/third_party/ffmpeg/ 5af686b3c..c6aed052a (1 commit)

https://chromium.googlesource.com/chromium/third_party/ffmpeg.git/+log/5af686b3cfa2..c6aed052aba9

$ git log 5af686b3c..c6aed052a --date=short --no-merges --format='%ad %ae %s'
2018-04-12 wolenetz lavf/mov and lavc/h264_slice cherry-picks

Created with:
  roll-dep src/third_party/ffmpeg

BUG=823145,822705
TBR=xhwang@chromium.org

Change-Id: I05c5b0c781157a67454e8d624f68ad8adcc00136
Reviewed-on: https://chromium-review.googlesource.com/1011397Reviewed-by: Matthew Wolenetz <wolenetz@chromium.org>
Commit-Queue: Matthew Wolenetz <wolenetz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#550451}

DEPS

@@ -545,7 +545,7 @@ deps = {
   },
 
   'src/third_party/ffmpeg':
-    Var('chromium_git') + '/chromium/third_party/ffmpeg.git' + '@' + '5af686b3cfa25ee98bb9a88008ff04257d560764',
+    Var('chromium_git') + '/chromium/third_party/ffmpeg.git' + '@' + 'c6aed052aba910a88d6e68c02946d17f94702da5',
 
   'src/third_party/flac':
     Var('chromium_git') + '/chromium/deps/flac.git' + '@' + '7d0f5b3a173ffe98db08057d1f52b7787569e0a6',