Separate CSSValueID mappings generator from ComputedStyleBase generator.

third_party/WebKit/Source/build/scripts/make_css_value_id_mappings.py

Index: third_party/WebKit/Source/build/scripts/make_css_value_id_mappings.py
diff --git a/third_party/WebKit/Source/build/scripts/make_css_value_id_mappings.py b/third_party/WebKit/Source/build/scripts/make_css_value_id_mappings.py
new file mode 100755
index 0000000000000000000000000000000000000000..1809ec0e94b3b75a08addc9ea80326568d983160
--- /dev/null
+++ b/third_party/WebKit/Source/build/scripts/make_css_value_id_mappings.py
@@ -0,0 +1,43 @@
+#!/usr/bin/env python
+# Copyright 2017 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import json5_generator
+import template_expander
+import make_style_builder
+
+from name_utilities import enum_for_css_keyword, enum_value_name
+
+
+class CSSValueIDMappingsWriter(make_style_builder.StyleBuilderWriter):
+    def __init__(self, json5_file_path):
+        super(CSSValueIDMappingsWriter, self).__init__(json5_file_path)
+        self._outputs = {
+            'CSSValueIDMappingsGenerated.h': self.generate_css_value_mappings,
+        }
+
+    @template_expander.use_jinja('CSSValueIDMappingsGenerated.h.tmpl')
+    def generate_css_value_mappings(self):
+        mappings = {}
+        include_paths = []
+        for property_ in self._properties.values():
+            if property_['field_template'] == 'keyword':
+                if property_['field_type_path']:
+                    type_name = property_['field_type_path'].split('/')[-1]
+                    include_paths.append(property_['field_type_path'] + '.h')
+                else:
+                    type_name = property_['type_name']
+
+                mappings[type_name] = {
+                    'default_value': enum_value_name(property_['default_value']),
+                    'mapping': [(enum_value_name(k), enum_for_css_keyword(k)) for k in property_['keywords']],
+                }
+
+        return {
+            'include_paths': list(sorted(include_paths)),
+            'mappings': mappings,
+        }
+
+if __name__ == '__main__':
+    json5_generator.Maker(CSSValueIDMappingsWriter).main()