Added parseShorthand method from the parser to CSSPropertyAPI.h.

third_party/WebKit/Source/build/scripts/templates/CSSPropertyDescriptor.cpp.tmpl

Index: third_party/WebKit/Source/build/scripts/templates/CSSPropertyDescriptor.cpp.tmpl
diff --git a/third_party/WebKit/Source/build/scripts/templates/CSSPropertyDescriptor.cpp.tmpl b/third_party/WebKit/Source/build/scripts/templates/CSSPropertyDescriptor.cpp.tmpl
index 457060f0e4c2e1601451339999db441ff99cb75c..93e8ecb7b3908c1bf36c0b2625faec380feb7dba 100644
--- a/third_party/WebKit/Source/build/scripts/templates/CSSPropertyDescriptor.cpp.tmpl
+++ b/third_party/WebKit/Source/build/scripts/templates/CSSPropertyDescriptor.cpp.tmpl
@@ -17,11 +17,11 @@ static CSSPropertyDescriptor cssPropertyDescriptors[] = {
     // An invalid CSSPropertyDescriptor. When functions are added to
     // CSSPropertyAPI, add a nullptr to represent their function pointers in the
     // struct initaliser.
-    { nullptr, false },
+    { nullptr, nullptr },
     // When functions are added to CSSPropertyAPI, also add them to the struct
     // initaliser below.
     {% for api_class in api_classes %}
-    { {{api_class.classname}}::parseSingleValue, true },
+    { {{api_class.classname}}::parseSingleValue, {{api_class.classname}}::parseShorthand },
     {% endfor %}
 };