Stop using WebCore namespace in generated code

Source/core/core_generated.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 583 matching lines @@
             '<@(stylesheets)'
           ],
           'outputs': [
             '<(blink_core_output_dir)/UserAgentStyleSheets.h',
             '<(blink_core_output_dir)/UserAgentStyleSheetsData.cpp',
           ],
           'action': [
             'python',
             '<@(scripts)',
             '--namespace',
-            'WebCore',
+            'blink',
             '--out-h=<(blink_core_output_dir)/UserAgentStyleSheets.h',
             '--out-cpp=<(blink_core_output_dir)/UserAgentStyleSheetsData.cpp',
             '<@(stylesheets)',
           ],
         },
         {
           'action_name': 'FetchInitiatorTypeNames',
           'inputs': [
             '<@(make_names_files)',
             'fetch/FetchInitiatorTypeNames.in',
@@ skipping 204 matching lines @@
             '../build/scripts/rule_bison.py',
             '<(RULE_INPUT_PATH)',
             '<(blink_core_output_dir)',
             '<(bison_exe)',
           ],
         },
       ],
     },
   ],
 }