Roll libvpx a208ec:4aca44

DEPS

 # This file is used to manage the dependencies of the Chromium src repo. It is
 # used by gclient to determine what version of each dependency to check out, and
 # where.
 #
 # For more information, please refer to the official documentation:
 #   https://sites.google.com/a/chromium.org/dev/developers/how-tos/get-the-code
 #
 # When adding a new dependency, please update the top-level .gitignore file
 # to list the dependency's destination directory.
 #
@@ skipping 15 matching lines @@
 #  git commit -a
 #  git cl upload
 
 
 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',
   'webkit_revision': 'f0fc3a16771d9107b49cfb54efd9e5da676223f6', # from svn revision 201688
   'chromium_git': 'https://chromium.googlesource.com',
-  'libvpx_revision': 'a208ecae8e6fff1c0d4286bdc000d7c5efaab411',
+  'libvpx_revision': '4aca44dc850089c5a7547a73f1a1885c88f63ddf',
   'sfntly_revision': '1bdaae8fc788a5ac8936d68bf24f37d977a13dac',
   'skia_revision': '1dec47a054bb455a3e9dead3518747f9d8164497',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.
   'v8_revision': '78c44d675e36456dc5746f1c718884a10f32c207',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling swarming_client
   # and whatever else without interference from each other.
   'swarming_revision': '2866a22530cb65feae5d9f64c83636aed5391d06',
@@ skipping 757 matching lines @@
     'pattern': '.',
     'action': [
         'python',
         'src/tools/check_git_config.py',
         '--running-as-hook',
     ],
   },
 ]