Rolling ffmpeg DEPS to r64326.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@64338 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/DEPS b/DEPS
index 61d92fb..952a863 100644
--- a/DEPS
+++ b/DEPS
@@ -11,7 +11,7 @@
   "nacl_revision": "3365",
   "libjingle_revision": "33",
   "libvpx_revision": "63575",
-  "ffmpeg_revision": "63146",
+  "ffmpeg_revision": "64326",
 }
 
 deps = {