Do not accept CSS-wide keywords for descriptors

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.
 
 
 // - runtime_flag=CSSGridLayout
 // The flag on RuntimeEnabledFeatures conditionally enables the property.
 // This doesn't currently work with alias_for.
 
 
+// - descriptor_only
+// These are actually descriptors and not CSS properties. Properties with
+// the same name as a descriptor do not get this flag.
+
+
 // - longhands=property;other-property
 // The property is a shorthand for several other properties.
 
 
 // Flags which go into CSSOMTypes:
 // - typedom_types=[Type|OtherType]
 // The property can take types specified in typedom_types for CSS Typed OM.
 // Keyword does not need to be specified as every property can take keywords.
 // - keywords=[keyword1|keyword2]
 // The property can take these keywords.
@@ skipping 409 matching lines @@
 -webkit-logical-height direction_aware
 -webkit-min-logical-width direction_aware
 -webkit-min-logical-height direction_aware
 -webkit-max-logical-width direction_aware
 -webkit-max-logical-height direction_aware
 
 // Properties that we ignore in the StyleBuilder.
 // TODO(timloh): This seems wrong, most of these shouldn't reach the StyleBuilder
 
 all builder_skip
-font-display builder_skip, runtime_flag=CSSFontDisplay
-max-zoom builder_skip
-min-zoom builder_skip
-orientation builder_skip
 page builder_skip
-src builder_skip
-unicode-range builder_skip
-user-zoom builder_skip
 -webkit-font-size-delta builder_skip
 -webkit-text-decorations-in-effect inherited, builder_skip
 
+// Descriptors
+
+font-display descriptor_only, runtime_flag=CSSFontDisplay
+max-zoom descriptor_only
+min-zoom descriptor_only
+orientation descriptor_only
+src descriptor_only
+unicode-range descriptor_only
+user-zoom descriptor_only
+
 // Shorthands
 
 animation longhands=animation-name;animation-duration;animation-timing-function;animation-delay;animation-iteration-count;animation-direction;animation-fill-mode;animation-play-state
 background longhands=background-image;background-position-x;background-position-y;background-size;background-repeat-x;background-repeat-y;background-attachment;background-origin;background-clip;background-color
 background-position longhands=background-position-x;background-position-y
 background-repeat longhands=background-repeat-x;background-repeat-y
 border longhands=border-top-color;border-top-style;border-top-width;border-right-color;border-right-style;border-right-width;border-bottom-color;border-bottom-style;border-bottom-width;border-left-color;border-left-style;border-left-width;border-image-source;border-image-slice;border-image-width;border-image-outset;border-image-repeat
 border-bottom longhands=border-bottom-width;border-bottom-style;border-bottom-color
 border-color longhands=border-top-color;border-right-color;border-bottom-color;border-left-color
 border-image longhands=border-image-source;border-image-slice;border-image-width;border-image-outset;border-image-repeat
@@ skipping 102 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