Implements CSSPropertyAPI for the fragmentation element properties.

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 9e50dfeab3bd56d3e84d46829b4be0eb27517f22..6959e1a679d26d0fb9b88656a4b8d8291e3da2b2 100644
--- a/third_party/WebKit/Source/core/css/CSSProperties.json5
+++ b/third_party/WebKit/Source/core/css/CSSProperties.json5
@@ -1391,6 +1391,8 @@
     },
     {
       name: "orphans",
+      api_class: "CSSPropertyAPIFragmentation",
+      api_methods: ["parseSingleValue"],
       inherited: true,
       interpolable: true,
       type_name: "short",
@@ -2021,6 +2023,8 @@
     "-webkit-box-lines",
     {
       name: "-webkit-box-ordinal-group",
+      api_class: "CSSPropertyAPIFragmentation",
+      api_methods: ["parseSingleValue"],
       type_name: "unsigned int",
     },
     "-webkit-box-orient",
@@ -2324,6 +2328,8 @@
     },
     {
       name: "widows",
+      api_class: "CSSPropertyAPIFragmentation",
+      api_methods: ["parseSingleValue"],
       inherited: true,
       interpolable: true,
       type_name: "short",