Translate viewport related meta tags into @viewport descriptors as suggested by the CSS Device Adap…

Source/core/core_derived_sources.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 643 matching lines @@
           'outputs': [
             '<(SHARED_INTERMEDIATE_DIR)/blink/CSSParser.cpp',
           ],
           'action': [
             'python',
             '../core/scripts/make_token_matcher.py',
             '../core/css/CSSParser-in.cpp',
             '<(SHARED_INTERMEDIATE_DIR)/blink/CSSParser.cpp',
           ],
         },
+        {
+          'action_name': 'MakeTokenMatcherForViewport',
+          'inputs': [
+            '<@(scripts_for_in_files)',
+            '../core/scripts/make_token_matcher.py',
+            '../core/html/HTMLMetaElement-in.cpp',
+          ],
+          'outputs': [
+            '<(SHARED_INTERMEDIATE_DIR)/webkit/HTMLMetaElement.cpp',
+          ],
+          'action': [
+            'python',
+            '../core/scripts/make_token_matcher.py',
+            '../core/html/HTMLMetaElement-in.cpp',
+            '<(SHARED_INTERMEDIATE_DIR)/webkit/HTMLMetaElement.cpp',
+          ],
+        },
+
       ],
       'rules': [
         {
           'rule_name': 'bison',
           'extension': 'y',
           'outputs': [
             '<(SHARED_INTERMEDIATE_DIR)/blink/<(RULE_INPUT_ROOT).cpp',
             '<(SHARED_INTERMEDIATE_DIR)/blink/<(RULE_INPUT_ROOT).h'
           ],
           'action': [
@@ skipping 20 matching lines @@
             'scripts/make-hash-tools.pl',
             '<(SHARED_INTERMEDIATE_DIR)/blink',
             '<(RULE_INPUT_PATH)',
             '<(gperf_exe)',
           ],
         },
       ],
     },
   ],
 }