libwebm: roll 9a235e0:4956b2d

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 255 matching lines @@
   'src/third_party/swiftshader':
     Var('swiftshader_git') + '/SwiftShader.git' + '@' +  Var('swiftshader_revision'),
 
   'src/third_party/cld_2/src':
     Var('chromium_git') + '/external/github.com/CLD2Owners/cld2.git' + '@' + '84b58a5d7690ebf05a91406f371ce00c3daf31c0',
 
   'src/third_party/cld_3/src':
     Var('chromium_git') + '/external/github.com/google/cld_3.git' + '@' + 'ae02d6b8a2af41e87c956c7c7d3f651a8b7b9e79',
 
   'src/third_party/libwebm/source':
-    Var('chromium_git') + '/webm/libwebm.git' + '@' + '9a235e0bc94319c5f7184bd69cbe5468a74a025c',
+    Var('chromium_git') + '/webm/libwebm.git' + '@' + '4956b2dec65352af32dc71bab553acb631c64177',
 
   'src/third_party/pdfium':
     Var('pdfium_git') + '/pdfium.git' + '@' +  Var('pdfium_revision'),
 
   'src/third_party/boringssl/src':
     Var('boringssl_git') + '/boringssl.git' + '@' +  Var('boringssl_revision'),
 
   'src/third_party/py_trace_event/src':
     Var('chromium_git') + '/external/py_trace_event.git' + '@' + 'dd463ea9e2c430de2b9e53dea57a77b4c3ac9b30',
 
@@ skipping 867 matching lines @@
 ]
 
 recursedeps = [
   # buildtools provides clang_format, libc++, and libc++abi
   'src/buildtools',
   # android_tools manages the NDK.
   'src/third_party/android_tools',
   # ANGLE manages DEPS that it also owns the build files for, such as dEQP.
   ("src/third_party/angle", "DEPS.chromium"),
 ]