Roll open-vcdiff 21d7d0b9:2b9bd1fe

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 94 matching lines @@
 ]
 
 deps = {
   'src/breakpad/src':
    Var('chromium_git') + '/breakpad/breakpad/src.git' + '@' + '51db53eec7293a35cb6fc10bd2e333f22dd9d201',
 
   'src/buildtools':
    Var('chromium_git') + '/chromium/buildtools.git' + '@' +  Var('buildtools_revision'),
 
   'src/sdch/open-vcdiff':
-   Var('chromium_git') + '/external/github.com/google/open-vcdiff.git' + '@' + '21d7d0b9c3d0c3ccbdb221c85ae889373f0a2a58',
+   Var('chromium_git') + '/external/github.com/google/open-vcdiff.git' + '@' + '2b9bd1fe548520e9355e457a134bab7e2f9c56c0',
 
   'src/testing/gtest':
    Var('chromium_git') + '/external/github.com/google/googletest.git' + '@' + '6f8a66431cb592dad629028a50b3dd418a408c87',
 
   'src/testing/gmock':
    Var('chromium_git') + '/external/googlemock.git' + '@' + '0421b6f358139f02e102c9c332ce19a33faf75be', # from svn revision 566
 
    'src/third_party/glslang/src':
    Var('chromium_git') + '/external/github.com/google/glslang.git' + '@' + '210c6bf4d8119dc5f8ac21da2d4c87184f7015e0',
 
@@ skipping 847 matching lines @@
     'name': 'doclava',
     'pattern': '.',
     'action': ['python',
                'src/build/android/download_doclava.py',
     ],
   },
 ]
 
 # ANGLE manages DEPS that it also owns the build files for, such as dEQP.
 recursedeps = [("src/third_party/angle", "DEPS.chromium")]