Call Python version of oilplan plugin flags script.

Source/config.gyp

 #
 # Copyright (C) 2013 Google Inc. 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
@@ skipping 84 matching lines @@
           # nullptr) conflict with upcoming c++0x types.
           'cflags_cc': ['-Wno-c++0x-compat'],
         }],
         ['OS=="linux" and target_arch=="arm"', {
           # Due to a bug in gcc arm, we get warnings about uninitialized
           # timesNewRoman.unstatic.3258 and colorTransparent.unstatic.4879.
           'cflags': ['-Wno-uninitialized'],
         }],
         # Only enable the blink_gc_plugin when using clang and chrome plugins.
         ['blink_gc_plugin==1 and clang==1 and clang_use_chrome_plugins==1', {
-          'cflags': ['<!@(../../../tools/clang/scripts/blink_gc_plugin_flags.sh enable-oilpan=<(enable_oilpan) <(blink_gc_plugin_flags))'],
+          'cflags': ['<!@(python ../../../tools/clang/scripts/blink_gc_plugin_flags.py enable-oilpan=<(enable_oilpan) <(blink_gc_plugin_flags))'],
           'xcode_settings': {
-            'OTHER_CFLAGS': ['<!@(../../../tools/clang/scripts/blink_gc_plugin_flags.sh enable-oilpan=<(enable_oilpan) <(blink_gc_plugin_flags))'],
+            'OTHER_CFLAGS': ['<!@(python ../../../tools/clang/scripts/blink_gc_plugin_flags.py enable-oilpan=<(enable_oilpan) <(blink_gc_plugin_flags))'],
+          },
+          'msvs_settings': {
+            'VCCLCompilerTool': {
+              'AdditionalOptions': ['<!@(python ../../../tools/clang/scripts/blink_gc_plugin_flags.py enable-oilpan=<(enable_oilpan) <(blink_gc_plugin_flags))'],
+            },
           },
         }],
         ['blink_disable_partition_allocator==1', {
           'defines': [
             'MEMORY_TOOL_REPLACES_ALLOCATOR',
           ],
         }],
       ],
     },
   },
@@ skipping 12 matching lines @@
     ],
     'direct_dependent_settings': {
       'variables': {
         'chromium_code': 1,
         'clang_warning_flags_unset': [ '-Wglobal-constructors' ],
       },
     },
   }
   ],
 }