Implements CSSPropertyAPI for the flex-basis property.

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

 // This file specifies all the CSS properties we support and the necessary
 // information for our code generation. The various supported arguments
 // are described below with example usage
 
 
 // - alias_for=other-property
 // Properties specifying alias_for should be virtually identical to the
 // properties they alias. Minor parsing differences are allowed as long as
 // the CSSValues created are of the same format of the aliased property.
 
@@ skipping 238 matching lines @@
 cx interpolable, svg, converter=convertLength
 cy interpolable, svg, converter=convertLength
 d interpolable, svg, converter=convertPathOrNone
 display
 dominant-baseline inherited, svg
 empty-cells inherited, independent, type_name=EEmptyCells, keyword_only, keywords=[show|hide], initial_keyword=show
 fill interpolable, inherited, svg, setter=setFillPaint, custom_all
 fill-opacity interpolable, inherited, svg, converter=convertNumberOrPercentage
 fill-rule inherited, svg, type_name=WindRule
 filter interpolable, converter=convertFilterOperations
-flex-basis interpolable, converter=convertLengthOrAuto
+flex-basis interpolable, converter=convertLengthOrAuto, api_class
 flex-direction
 flex-grow interpolable, type_name=float
 flex-shrink interpolable, type_name=float
 flex-wrap
 float type_name=EFloat, name_for_methods=Floating, keyword_only, keywords=[none|left|right], initial_keyword=none
 flood-color interpolable, svg, converter=convertColor
 flood-opacity interpolable, svg, converter=convertNumberOrPercentage
 grid-auto-columns runtime_flag=CSSGridLayout, converter=convertGridTrackSizeList
 grid-auto-flow runtime_flag=CSSGridLayout, converter=convertGridAutoFlow, type_name=GridAutoFlow
 grid-auto-rows runtime_flag=CSSGridLayout, converter=convertGridTrackSizeList
@@ skipping 380 matching lines @@
 -webkit-text-size-adjust alias_for=text-size-adjust
 -webkit-transform alias_for=transform
 -webkit-transform-origin alias_for=transform-origin
 -webkit-transform-style alias_for=transform-style
 -webkit-transition alias_for=transition
 -webkit-transition-delay alias_for=transition-delay
 -webkit-transition-duration alias_for=transition-duration
 -webkit-transition-property alias_for=transition-property
 -webkit-transition-timing-function alias_for=transition-timing-function
 -webkit-user-select alias_for=user-select