Add parsing support for display: contents, and minimum behavior similar to display: none

third_party/WebKit/Source/devtools/front_end/sdk/CSSMetadata.js

 /*
  * Copyright (C) 2010 Nikita Vasilyev. All rights reserved.
  * Copyright (C) 2010 Joseph Pecoraro. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
@@ skipping 437 matching lines @@
         "fantasy", "monospace", "-webkit-body", "-webkit-pictograph"
     ] },
     "dominant-baseline": { values: [
         "middle", "auto", "central", "text-before-edge", "text-after-edge", "ideographic", "alphabetic", "hanging",
         "mathematical", "use-script", "no-change", "reset-size"
     ] },
     "display": { values: [
         "none", "inline", "block", "list-item", "run-in", "inline-block", "table", "inline-table",
         "table-row-group", "table-header-group", "table-footer-group", "table-row", "table-column-group",
         "table-column", "table-cell", "table-caption", "-webkit-box", "-webkit-inline-box",
-        "flex", "inline-flex", "grid", "inline-grid"
+        "flex", "inline-flex", "grid", "inline-grid", "contents"
     ] },
     "-webkit-text-emphasis-position": { values: [
         "over", "under"
     ] },
     "image-rendering": { values: [
         "auto", "optimizeSpeed", "optimizeQuality", "pixelated"
     ] },
     "alignment-baseline": { values: [
         "baseline", "middle", "auto", "before-edge", "after-edge", "central", "text-before-edge", "text-after-edge",
         "ideographic", "alphabetic", "hanging", "mathematical"
@@ skipping 491 matching lines @@
     "widows": 115,
     "width": 268,
     "will-change": 74,
     "word-break": 166,
     "word-spacing": 157,
     "word-wrap": 197,
     "writing-mode": 41,
     "z-index": 239,
     "zoom": 200
 };