Use a converter to resolve style for -webkit-filter and backdrop-filter

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 96 matching lines @@
 alignment-baseline svg
 align-self initial=initialSelfAlignment, converter=convertSelfOrDefaultAlignmentData
 animation-delay custom_all
 animation-direction custom_all
 animation-duration custom_all
 animation-fill-mode custom_all
 animation-iteration-count custom_all
 animation-name custom_all
 animation-play-state custom_all
 animation-timing-function custom_all
-backdrop-filter interpolable, custom_value, runtime_flag=CSSBackdropFilter
+backdrop-filter interpolable, converter=convertFilterOperations, runtime_flag=CSSBackdropFilter
 backface-visibility
 background-attachment custom_all
 background-blend-mode custom_all
 background-clip custom_all
 background-color interpolable, custom_all
 background-image interpolable, custom_all
 background-origin custom_all
 background-position-x interpolable, custom_all
 background-position-y interpolable, custom_all
 background-repeat-x custom_all
@@ skipping 209 matching lines @@
 -webkit-column-break-after type_name=EPageBreak, initial=initialPageBreak
 -webkit-column-break-before type_name=EPageBreak, initial=initialPageBreak
 -webkit-column-break-inside type_name=EPageBreak, initial=initialPageBreak
 -webkit-column-count interpolable, type_name=unsigned short, custom_all
 -webkit-column-gap interpolable, converter=convertComputedLength<float>, custom_all
 -webkit-column-rule-color interpolable, custom_all
 -webkit-column-rule-style type_name=EBorderStyle, initial=initialBorderStyle
 -webkit-column-rule-width interpolable, converter=convertLineWidth<unsigned short>
 -webkit-column-span type_name=ColumnSpan
 -webkit-column-width interpolable, converter=convertComputedLength<float>, custom_all
--webkit-filter interpolable, custom_value
+-webkit-filter interpolable, converter=convertFilterOperations
 -webkit-highlight inherited, converter=convertString<CSSValueNone>
 -webkit-hyphenate-character inherited, name_for_methods=HyphenationString, converter=convertString<CSSValueAuto>
 -webkit-line-break inherited, type_name=LineBreak
 -webkit-line-clamp type_name=LineClampValue
 -webkit-margin-after-collapse type_name=EMarginCollapse
 -webkit-margin-before-collapse type_name=EMarginCollapse
 -webkit-margin-bottom-collapse type_name=EMarginCollapse, name_for_methods=MarginAfterCollapse
 -webkit-margin-top-collapse type_name=EMarginCollapse, name_for_methods=MarginBeforeCollapse
 -webkit-mask-box-image-outset interpolable, custom_all
 -webkit-mask-box-image-repeat custom_all
@@ skipping 181 matching lines @@
 -webkit-shape-margin alias_for=shape-margin
 -webkit-shape-outside alias_for=shape-outside
 -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