Roll FFMpeg DEPS to pick up security fixes.

- Adds a test case for the issue.
- Fixes ordering issues with EXPECT_EQ()
- Notes a recent memory leak regression.
- Fixes stale errors and hashes for unit test.

Includes:
82ae69c Prevent stack buffer overflow during AAC decoding.

BUG=161639
TEST=unit test under asan/valgrind.


Review URL: https://chromiumcodereview.appspot.com/11414076

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@168731 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/DEPS b/DEPS
index 22708ba..74693247 100644
--- a/DEPS
+++ b/DEPS
@@ -25,8 +25,8 @@
 
   # These two FFmpeg variables must be updated together.  One is used for SVN
   # checkouts and the other for Git checkouts.
-  "ffmpeg_revision": "166067",
-  "ffmpeg_hash": "ca54d18833e0caccbc4bcddc3df9f15d08c4b567",
+  "ffmpeg_revision": "168654",
+  "ffmpeg_hash": "82ae69cc47f25f9a59cf2ca8742e3391c34e7602",
 
   "sfntly_revision": "134",
   "skia_revision": "6474",