Roll libyuv to r1557

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 202 matching lines @@
   'src/third_party/webrtc':
     Var('chromium_git') + '/external/webrtc/trunk/webrtc.git' + '@' + '71ae2ea48a6b6c42eb79bfd70acf888056b6a711', # commit position 11032
 
   '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' + '@' + '1019e4537fc1bfc6ee505cd1c628b645c7e966b7', # from version 1537
+    Var('chromium_git') + '/libyuv/libyuv.git' + '@' + '1ccbf8fb7b1d84d37eabb26de933f841daf0ade7', # from version 1557
 
   '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 575 matching lines @@
         'src/tools',
     ],
   },
   {
     # A change to a .gyp, .gypi, or to GYP itself should run the generator.
     'name': 'gyp',
     'pattern': '.',
     'action': ['python', 'src/build/gyp_chromium'],
   },
 ]