Added functionality in ComputedStyleBase to use platform/ types

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 22 matching lines @@
 // TODO(aazzam): When most properties have been implemented, modify this so that
 // properties with default classnames do not get this flag, and introduce a
 // 'not_implemented' flag instead.
 
 
 // - keyword_only
 // These properties only store keyword values. This is used when
 // generating the ComputedStyle storage for the property. The initial
 // value for this property on a ComputedStyle is specified with the
 // initial_keyword flag below.
+// TODO(sashab): Rename this to field_type=keyword once we support
+// multiple types of generatable fields in ComputedStyle
 // TODO(sashab, meade): Remove this once TypedOM types are specified for
 // every property, since this value can be inferred from that.
 
 
+// - field_storage_type=path/to/Type
+// For properties that have generated field storage in ComputedStyle,
+// this optional argument will override the field's generated type with
+// an external one specified at the given path. The type must be defined
+// in a header file at that path, and have the same name as the file.
+// Currently, only enum types are supported, and the enum's only values
+// must be CamelCase values of the keywords of the property.
+
+
 // - keywords=[keyword1|keyword2]
 // This specifies all valid keyword values for the property.
 // TODO(sashab): Once all properties are represented here, delete
 // CSSValueKeywords.in and use this list instead.
 
 
 // - initial_keyword
 // This specifies the initial keyword value for the keyword_only
 // property.
 
@@ skipping 87 matching lines @@
 animation-play-state custom_all
 animation-timing-function custom_all
 transition-delay custom_all
 transition-duration custom_all
 transition-property custom_all
 transition-timing-function custom_all
 
 // High Priority and all other font properties.
 // Other properties can depend upon high priority properties (e.g. font-size / ems)
 color interpolable, inherited, custom_all
-direction inherited, custom_value
+direction inherited, custom_value, keyword_only, keywords=[ltr|rtl], initial_keyword=ltr, field_storage_type=platform/text/TextDirection
 font-family inherited, font, type_name=FontDescription::FamilyDescription, name_for_methods=FamilyDescription, converter=convertFontFamily
 font-kerning inherited, font, type_name=FontDescription::Kerning, name_for_methods=Kerning
 font-size interpolable, inherited, font, name_for_methods=Size, getter=getSize, converter=convertFontSize
 font-size-adjust runtime_flag=CSSFontSizeAdjust, interpolable, inherited, font, name_for_methods=SizeAdjust, converter=convertFontSizeAdjust
 font-stretch inherited, font, type_name=FontStretch, name_for_methods=Stretch
 font-style inherited, font, type_name=FontStyle, name_for_methods=Style
 font-variant-ligatures inherited, font, type_name=VariantLigatures, name_for_methods=VariantLigatures, converter=convertFontVariantLigatures
 font-variant-caps inherited, font, name_for_methods=VariantCaps, converter=convertFontVariantCaps
 font-variant-numeric inherited, font, name_for_methods=VariantNumeric, converter=convertFontVariantNumeric
 font-weight interpolable, inherited, font, type_name=FontWeight, name_for_methods=Weight, converter=convertFontWeight
@@ skipping 466 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