Made a generator for CSSPropertyDescriptor.cpp

third_party/WebKit/Source/core/css/CSSProperties.in

Index: third_party/WebKit/Source/core/css/CSSProperties.in
diff --git a/third_party/WebKit/Source/core/css/CSSProperties.in b/third_party/WebKit/Source/core/css/CSSProperties.in
index 317166e24ffee690fddb94a1ee2971ae8ad1b8db..f4e0fc747db7e01f2e5e98f9e36e06278bd627d0 100644
--- a/third_party/WebKit/Source/core/css/CSSProperties.in
+++ b/third_party/WebKit/Source/core/css/CSSProperties.in
@@ -23,6 +23,17 @@
 // The property is a shorthand for several other properties.
 
 
+// - api_class[=classname]
+// Specifies the existance (and optionally name) of a CSSPropertyAPI implementation for the property to be used by make_css_property_descriptor.py.
+// See core/css/properties/CSSPropertyAPI.h for API details.
+// * Add this flag if the API has been implemented for this property.
+// * If the classname for this is different to the name of the property, specify a
+//   value for this flag. e.g. api_class=CSSPropertyAPIWebkitPadding
+// TODO(aazzam): When most properties have been implemented, modify this so that
+// properties with default classnames do not get this flag, and introduce a
+// 'not_implemented' flag instead.
+
+
 // - keyword_only
 // These properties only store keyword values. This is used when
 // generating the ComputedStyle storage for the property. The initial
@@ -469,10 +480,10 @@ z-index interpolable, type_name=int, custom_all
 -webkit-margin-start direction_aware
 -webkit-margin-before direction_aware
 -webkit-margin-after direction_aware
--webkit-padding-end direction_aware
--webkit-padding-start direction_aware
--webkit-padding-before direction_aware
--webkit-padding-after direction_aware
+-webkit-padding-end direction_aware, api_class=CSSPropertyAPIWebkitPadding
+-webkit-padding-start direction_aware, api_class=CSSPropertyAPIWebkitPadding
+-webkit-padding-before direction_aware, api_class=CSSPropertyAPIWebkitPadding
+-webkit-padding-after direction_aware, api_class=CSSPropertyAPIWebkitPadding
 -webkit-logical-width direction_aware
 -webkit-logical-height direction_aware
 -webkit-min-logical-width direction_aware