Roll src/third_party/ffmpeg/ 23e0b491f..423f74fab (1 commit)

https://chromium.googlesource.com/chromium/third_party/ffmpeg.git/+log/23e0b491fa58..423f74fab02f

$ git log 23e0b491f..423f74fab --date=short --no-merges --format='%ad %ae %s'
2017-11-30 dalecurtis Fixup OWNERS file for FFmpeg.

BUG=769026
TEST=none
TBR=wolenetz

Created with:
  roll-dep src/third_party/ffmpeg

Change-Id: Ib61e336ca7f79cbea6e59be44632683f81fce44a
Reviewed-on: https://chromium-review.googlesource.com/802183Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Reviewed-by: Matthew Wolenetz <wolenetz@chromium.org>
Commit-Queue: Dale Curtis <dalecurtis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#520853}

DEPS

@@ -335,7 +335,7 @@ deps = {
   },
 
   'src/third_party/ffmpeg':
-    Var('chromium_git') + '/chromium/third_party/ffmpeg.git' + '@' + '23e0b491fa58a44cf9b2b386a29c69e67169ef19',
+    Var('chromium_git') + '/chromium/third_party/ffmpeg.git' + '@' + '423f74fab02ff573b52abd542eb5dfdadaa05cf4',
 
   'src/third_party/findbugs': {
       'url': Var('chromium_git') + '/chromium/deps/findbugs.git' + '@' + '4275d9ac8610db6b1bc9a5e887f97e41b33fac67',