Implements CSSPropertyAPI for the fragmentation element properties.

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 aed5abc6f3cda23da6a2a3365656bf13eafacb09..c124260278ded689be00a0f03c67bb139171a1ec 100644
--- a/third_party/WebKit/Source/core/css/CSSProperties.in
+++ b/third_party/WebKit/Source/core/css/CSSProperties.in
@@ -324,7 +324,7 @@ offset-rotate runtime_flag=CSSOffsetRotate, interpolable, converter=convertOffse
 offset-rotation runtime_flag=CSSOffsetRotation, interpolable, converter=convertOffsetRotate
 opacity interpolable, type_name=float
 order type_name=int
-orphans interpolable, inherited, type_name=short
+orphans interpolable, inherited, type_name=short, api_class=CSSPropertyAPIBoxGroup
 outline-color interpolable, custom_all
 outline-offset interpolable, converter=convertComputedLength<int>, api_class
 outline-style custom_all
@@ -417,7 +417,7 @@ y interpolable, svg, converter=convertLength
 -webkit-box-flex type_name=float
 -webkit-box-flex-group type_name=unsigned int, api_class
 -webkit-box-lines
--webkit-box-ordinal-group type_name=unsigned int
+-webkit-box-ordinal-group type_name=unsigned int, api_class=CSSPropertyAPIBoxGroup
 -webkit-box-orient
 -webkit-box-pack
 -webkit-box-reflect converter=convertBoxReflect
@@ -471,7 +471,7 @@ column-width interpolable, converter=convertComputedLength<float>, custom_all
 -webkit-user-modify inherited
 user-select inherited
 white-space inherited, independent, keyword_only, keywords=[normal|pre|pre-wrap|pre-line|nowrap|-webkit-nowrap], initial_keyword=normal
-widows interpolable, inherited, type_name=short
+widows interpolable, inherited, type_name=short, api_class=CSSPropertyAPIBoxGroup
 width interpolable, initial=initialSize, converter=convertLengthSizing, typedom_types=[Length], keywords=[auto], supports_percentage
 will-change custom_all, api_class
 word-break inherited