Shard v8_base.lib on Windows to avoid 2G .lib limit

tools/gyp/v8.gyp

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 1268 matching lines @@
             '../../src/ic/ppc/ic-ppc.cc',
             '../../src/ic/ppc/ic-compiler-ppc.cc',
             '../../src/ic/ppc/stub-cache-ppc.cc',
           ],
         }],
         ['OS=="win"', {
           'variables': {
             'gyp_generators': '<!(echo $GYP_GENERATORS)',
           },
           'msvs_disabled_warnings': [4351, 4355, 4800],
+          # When building Official, the .lib is too large and exceeds the 2G
+          # limit. This breaks it into multiple pieces to avoid the limit.
+          # See http://crbug.com/485155.
+          'msvs_shard': 4,
         }],
         ['component=="shared_library"', {
           'defines': [
             'BUILDING_V8_SHARED',
             'V8_SHARED',
           ],
         }],
         ['v8_postmortem_support=="true"', {
           'sources': [
             '<(SHARED_INTERMEDIATE_DIR)/debug-support.cc',
@@ skipping 548 matching lines @@
         }],
         ['want_separate_host_toolset==1', {
           'toolsets': ['host'],
         }, {
           'toolsets': ['target'],
         }],
       ],
     },
   ],
 }