Made border-collapse property independent.

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 165 matching lines @@
 background-position-y interpolable, custom_all
 background-repeat-x custom_all
 background-repeat-y custom_all
 background-size interpolable, custom_all
 baseline-shift interpolable, svg, custom_inherit, custom_value
 border-bottom-color interpolable, custom_all
 border-bottom-left-radius interpolable, initial=initialBorderRadius, converter=convertRadius
 border-bottom-right-radius interpolable, initial=initialBorderRadius, converter=convertRadius
 border-bottom-style type_name=EBorderStyle, initial=initialBorderStyle
 border-bottom-width interpolable, initial=initialBorderWidth, converter=convertLineWidth<unsigned>
-border-collapse inherited, keyword_only, keywords=[separate|collapse], initial_keyword=separate
+border-collapse inherited, independent, keyword_only, keywords=[separate|collapse], initial_keyword=separate
 border-image-outset interpolable, custom_all
 border-image-repeat custom_all
 border-image-slice interpolable, custom_all
 border-image-source interpolable, custom_value, typedom_types=[Image], keywords=[none]
 border-image-width interpolable, custom_all
 border-left-color interpolable, custom_all
 border-left-style type_name=EBorderStyle, initial=initialBorderStyle
 border-left-width interpolable, initial=initialBorderWidth, converter=convertLineWidth<unsigned>
 border-right-color interpolable, custom_all
 border-right-style type_name=EBorderStyle, initial=initialBorderStyle
@@ skipping 420 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