roll libyuv from r1475 to r1480.

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 207 matching lines @@
   'src/third_party/webrtc':
     Var('chromium_git') + '/external/webrtc/trunk/webrtc.git' + '@' + 'e3f2ebadf5073ad63c1377967b54fb918e07ab2e', # commit position 9890
 
   'src/third_party/openmax_dl':
     Var('chromium_git') + '/external/webrtc/deps/third_party/openmax.git' + '@' +  Var('openmax_dl_revision'),
 
   'src/third_party/jsoncpp/source':
     Var('chromium_git') + '/external/github.com/open-source-parsers/jsoncpp.git' + '@' + 'f572e8e42e22cfcf5ab0aea26574f408943edfa4', # from svn 248
 
   'src/third_party/libyuv':
-    Var('chromium_git') + '/libyuv/libyuv.git' + '@' + '0bc626a5d776fd8399d14d7f6e24e557c14f4e7e', # from version 1475
+    Var('chromium_git') + '/libyuv/libyuv.git' + '@' + '8467f14ebb82ae8f9c404b35dbc03ce1abbccc7c', # from version 1480
 
   'src/third_party/smhasher/src':
     Var('chromium_git') + '/external/smhasher.git' + '@' + 'e87738e57558e0ec472b2fc3a643b838e5b6e88f',
 
   'src/third_party/libaddressinput/src':
     Var('chromium_git') + '/external/libaddressinput.git' + '@' + '5eeeb797e79fa01503fcdcbebdc50036fac023ef',
 
   # These are all at libphonenumber r728.
   'src/third_party/libphonenumber/src/phonenumbers':
     Var('chromium_git') + '/external/libphonenumber/cpp/src/phonenumbers.git' + '@' + '0d6e3e50e17c94262ad1ca3b7d52b11223084bca',
@@ skipping 565 matching lines @@
     'pattern': '.',
     'action': [
         'python',
         'src/tools/check_git_config.py',
         '--running-as-hook',
     ],
   },
 ]