Add image-rendering: pixelated.

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 360 matching lines @@
     "display": { values: [
         "none", "inline", "block", "list-item", "run-in", "compact", "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"
     ] },
     "-webkit-text-emphasis-position": { values: [
         "over", "under"
     ] },
     "image-rendering": { values: [
-        "auto", "optimizeSpeed", "optimizeQuality"
+        "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"
     ] },
     "outline-width": { values: [
         "medium", "thick", "thin"
     ] },
     "text-line-through-width": { values: [
         "normal", "medium", "auto", "thick", "thin"
@@ skipping 602 matching lines @@
      * @param {string} longhand
      * @return {?Array.<string>}
      */
     shorthands: function(longhand)
     {
         return this._shorthands[longhand];
     }
 }
 
 WebInspector.CSSMetadata.initializeWithSupportedProperties([]);