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..f0e97600c30481d881c3c9a42a7d5ad069b03931 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 +189,29 @@ 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_to_diff'], entry['methods_to_diff'], root_group)
     return diff_functions_map
 
 
-def _create_diff_groups(fields_to_diff, root_group):
+def _list_field_dependencies(methods_to_diff):
+    field_dependencies = []
+    for entry in methods_to_diff:
+        field_dependencies += entry['field_dependencies']
+    return field_dependencies
+
+
+def _create_diff_groups(fields_to_diff, methods_to_diff, root_group):
     diff_group = DiffGroup(root_group.member_name)
+    field_dependencies = _list_field_dependencies(methods_to_diff)
     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 + field_dependencies) for field in subgroup.all_fields):
+            diff_group.subgroups.append(_create_diff_groups(fields_to_diff, methods_to_diff, subgroup))
     for field in root_group.fields:
         if field.property_name in fields_to_diff:
             diff_group.expressions.append(field.getter_expression)
+        for entry in methods_to_diff:
+            if field.property_name in entry['field_dependencies']:
+                diff_group.expressions.append(entry['method'])
     return diff_group