Generate diffs for fields in ComputedStyle that use their public getters

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

Index: third_party/WebKit/Source/build/scripts/make_computed_style_base.py
diff --git a/third_party/WebKit/Source/build/scripts/make_computed_style_base.py b/third_party/WebKit/Source/build/scripts/make_computed_style_base.py
index c039ac174bc2e60661b107c5e12a34f6147e42a7..d81931ac23c7b5635d48db58aaa337646978e4c3 100755
--- a/third_party/WebKit/Source/build/scripts/make_computed_style_base.py
+++ b/third_party/WebKit/Source/build/scripts/make_computed_style_base.py
@@ -189,18 +189,21 @@ def _group_fields(fields):
 def _create_diff_groups_map(diff_function_inputs, root_group):
     diff_functions_map = {}
     for entry in diff_function_inputs:
-        diff_functions_map[entry['name']] = _create_diff_groups(entry['fields'], root_group)
+        diff_functions_map[entry['name']] = _create_diff_groups(entry['fields'], entry['map_of_expressions'], root_group)
     return diff_functions_map
 
 
-def _create_diff_groups(fields_to_diff, root_group):
+def _create_diff_groups(fields_to_diff, map_of_expressions, root_group):
     diff_group = DiffGroup(root_group.member_name)
     for subgroup in root_group.subgroups:
-        if any(field.property_name in fields_to_diff for field in subgroup.all_fields):
-            diff_group.subgroups.append(_create_diff_groups(fields_to_diff, subgroup))
+        if any(field.property_name in (fields_to_diff + map_of_expressions.values()) for field in subgroup.all_fields):
+            diff_group.subgroups.append(_create_diff_groups(fields_to_diff, map_of_expressions, subgroup))
     for field in root_group.fields:
         if field.property_name in fields_to_diff:
             diff_group.expressions.append(field.getter_expression)
+        for expression, property_ in map_of_expressions.iteritems():
+            if property_ == field.property_name:
+                diff_group.expressions.append(expression)
     return diff_group