Roll FFmpeg for security fixes.

DEPS

 # When adding a new dependency, please update the top-level .gitignore file
 # to list the dependency's destination directory.
 
 vars = {
   # Use this googlecode_url variable only if there is an internal mirror for it.
   # If you do not know, use the full path while defining your new deps entry.
   "googlecode_url": "http://%s.googlecode.com/svn",
   "sourceforge_url": "http://%(repo)s.svn.sourceforge.net/svnroot/%(repo)s",
   "webkit_trunk": "http://svn.webkit.org/repository/webkit/trunk",
   "nacl_trunk": "http://src.chromium.org/native_client/trunk",
   "webkit_revision": "124752",
   "chromium_git": "http://git.chromium.org/git",
   "chromiumos_git": "http://git.chromium.org/chromiumos",
   "swig_revision": "69281",
   "nacl_revision": "9370",
   # After changing nacl_revision, run 'glient sync' and check native_client/DEPS
   # to update other nacl_*_revision's.
   "nacl_tools_revision": "9330",  # native_client/DEPS: tools_rev
   "gtm_revision": "534",
 
   "libjingle_revision": "165",
   "libphonenumber_revision": "456",
   "libvpx_revision": "149334",
   "lss_revision": "11",
 
   # These two FFmpeg variables must be updated together.  One is used for SVN
   # checkouts and the other for Git checkouts.
-  "ffmpeg_revision": "149654",
-  "ffmpeg_hash": "f5a6dc3ba5038dca504545164bff477bb75a9a0e",
+  "ffmpeg_revision": "150165",
+  "ffmpeg_hash": "2079ffae30f8da6c6eed985cce00e04c31b40888",
 
   "sfntly_revision": "134",
   "skia_revision": "4959",
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and V8 without interference from each other.
   "v8_revision": "12253",
   "webrtc_revision": "2549",
   "jsoncpp_revision": "248",
   "nss_revision": "145873",
@@ skipping 551 matching lines @@
     "pattern": ".",
     "action": ["python", "src/build/util/lastchange.py",
                "-o", "src/build/util/LASTCHANGE"],
   },
   {
     # A change to a .gyp, .gypi, or to GYP itself should run the generator.
     "pattern": ".",
     "action": ["python", "src/build/gyp_chromium"],
   },
 ]