Stop using WebCore namespace in generated code

Source/modules/modules.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 59 matching lines @@
         ],
         'outputs': [
             '<(blink_modules_output_dir)/CachePolyfill.h',
             '<(blink_modules_output_dir)/CachePolyfill.cpp',
         ],
         'action': [
             'python',
             '../build/scripts/make-file-arrays.py',
             '--out-h=<(blink_modules_output_dir)/CachePolyfill.h',
             '--out-cpp=<(blink_modules_output_dir)/CachePolyfill.cpp',
-            '--namespace=WebCore',
+            '--namespace=blink',
             '<@(resources)',
         ],
       },
       {
         # GN version: //third_party/WebKit/Source/modules:modules_cache_storage_polyfill
         'action_name': 'CacheStoragePolyfill',
         'process_outputs_as_sources': 1,
         'variables': {
             'resources': [
                  'serviceworkers/polyfills/cacheStoragePolyfill.js',
             ],
         },
         'inputs': [
             '../build/scripts/make-file-arrays.py',
             '<@(resources)',
         ],
         'outputs': [
             '<(blink_modules_output_dir)/CacheStoragePolyfill.h',
             '<(blink_modules_output_dir)/CacheStoragePolyfill.cpp',
         ],
         'action': [
             'python',
             '../build/scripts/make-file-arrays.py',
             '--out-h=<(blink_modules_output_dir)/CacheStoragePolyfill.h',
             '--out-cpp=<(blink_modules_output_dir)/CacheStoragePolyfill.cpp',
-            '--namespace=WebCore',
+            '--namespace=blink',
             '<@(resources)',
         ],
       },
     ],
     # Disable c4267 warnings until we fix size_t to int truncations.
     'msvs_disabled_warnings': [ 4267, 4334, ]
   },
   {
     # GN version: //third_party/WebKit/Source/modules:modules_testing
     'target_name': 'modules_testing',
@@ skipping 25 matching lines @@
     ],
     'sources': [
       # bison rule
       '../core/css/CSSGrammar.y',
       '../core/xml/XPathGrammar.y',
     ],
     'actions': [
     ],
   }],
 }