Implement parseShorthand API for shorthand properties, "overflow", "font" and "font-variant"

third_party/WebKit/Source/core/css/CSSProperties.json5

Index: third_party/WebKit/Source/core/css/CSSProperties.json5
diff --git a/third_party/WebKit/Source/core/css/CSSProperties.json5 b/third_party/WebKit/Source/core/css/CSSProperties.json5
index 8896c0aaead0a6e26a761f6df7ccf039b88ab075..aec2e34151245dc996befee4dbaf3e5464a8e974 100644
--- a/third_party/WebKit/Source/core/css/CSSProperties.json5
+++ b/third_party/WebKit/Source/core/css/CSSProperties.json5
@@ -3288,11 +3288,15 @@
     {
       name: "font",
       longhands: "font-style;font-variant-ligatures;font-variant-caps;font-variant-numeric;font-weight;font-stretch;font-size;line-height;font-family",
+      api_class: true,

[Bugs Nash, 2017/06/16 03:51:50]

'api_class' and 'api_methods' should go after 'name' and before 'is_descriptor'
for consistency with longhands

[Jia, 2017/06/19 03:54:41]

Done.

+      api_methods: ["parseShorthand"],
     },
     {
       name: "font-variant",
       is_descriptor: true,
       longhands: "font-variant-ligatures;font-variant-caps;font-variant-numeric",
+      api_class: true,
+      api_methods: ["parseShorthand"],
     },
     {
       name: "grid",
@@ -3362,6 +3366,8 @@
     {
       name: "overflow",
       longhands: "overflow-x;overflow-y",
+      api_class: true,
+      api_methods: ["parseShorthand"],
     },
     {
       name: "padding",