Revert libvpx roll 271029:269083

undo https://codereview.chromium.org/288033020

R=mallinath@chromium.org, tomfinegan@chromium.org

Review URL: https://codereview.chromium.org/289003009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@271068 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -40,7 +40,7 @@ vars = {
   "google_toolbox_for_mac_revision": "662",
   "libaddressinput_revision": "176",
   "libphonenumber_revision": "621",
-  "libvpx_revision": "271029",
+  "libvpx_revision": "269083",
   "lss_revision": "26",
   "sfntly_revision": "228",
   "lighttpd_revision": "33737",