Added CSSPropertyDescriptor.h.tmpl to generate CSSPropertyDescriptor.h.

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

Index: third_party/WebKit/Source/build/scripts/make_css_property_apis.py
diff --git a/third_party/WebKit/Source/build/scripts/make_css_property_apis.py b/third_party/WebKit/Source/build/scripts/make_css_property_apis.py
index c69630de092514edef714da9a3fccb517f1bc7ac..140068c12c0b1f0a4be377ca065ea5baf4dd1230 100755
--- a/third_party/WebKit/Source/build/scripts/make_css_property_apis.py
+++ b/third_party/WebKit/Source/build/scripts/make_css_property_apis.py
@@ -36,6 +36,7 @@ class CSSPropertyAPIWriter(json5_generator.Writer):
         self._outputs = {
             'CSSPropertyDescriptor.cpp': self.generate_property_descriptor_cpp,
             'CSSPropertyAPI.h': self.generate_property_api,
+            'CSSPropertyDescriptor.h': self.generate_property_descriptor_h,
         }
 
         # Stores a map of API method name -> (return_type, parameters, comment)
@@ -92,6 +93,13 @@ class CSSPropertyAPIWriter(json5_generator.Writer):
             'all_api_methods': self.all_api_methods,
         }
 
+    @template_expander.use_jinja('CSSPropertyDescriptor.h.tmpl')
+    def generate_property_descriptor_h(self):
+        return {
+            'ordered_api_method_names': self.ordered_api_method_names,
+            'all_api_methods': self.all_api_methods,
+        }
+
     # Provides a function object given the classname of the property.
     def generate_property_api_h_builder(self, api_classname):
         @template_expander.use_jinja('CSSPropertyAPIFiles.h.tmpl')