Add CharacterData.h to input for Character Data generation step

third_party/WebKit/Source/platform/platform_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 124 matching lines @@
             '--key-positions=*',
             '-D', '-s', '2',
             '<@(_inputs)',
             '--output-file=<(blink_platform_output_dir)/ColorData.cpp',
           ],
         },
         {
           'action_name': 'CharacterData',
           'inputs': [
             'fonts/CharacterDataGenerator.cpp',
+            'fonts/CharacterData.h'
           ],
           'outputs': [
             '<(blink_platform_output_dir)/CharacterData.cpp',
           ],
           'conditions': [
             ['generate_character_data==1', {
               'action': [
                 '<(PRODUCT_DIR)/character_data_generator',
                 '<(blink_platform_output_dir)/CharacterData.cpp',
               ],
@@ skipping 14 matching lines @@
       'toolsets': ['host'],
       'sources': [
         'fonts/CharacterDataGenerator.cpp',
       ],
       'dependencies': [
         '<(DEPTH)/third_party/icu/icu.gyp:icuuc#host',
       ],
     },
   ],
 }