[DevTools] Remove layout editor experiment.

third_party/WebKit/Source/devtools/front_end/elements/StylePropertyHighlighter.js

+// Copyright (c) 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * @unrestricted
+ */
+Elements.StylePropertyHighlighter = class {
+  /**
+   * @param {!Elements.StylesSidebarPane} ssp
+   * @param {!SDK.CSSProperty} cssProperty
+   */
+  constructor(ssp, cssProperty) {
+    this._styleSidebarPane = ssp;
+    this._cssProperty = cssProperty;
+  }
+
+  perform() {
+    // Expand all shorthands.
+    for (var section of this._styleSidebarPane.allSections()) {
+      for (var treeElement = section.propertiesTreeOutline.firstChild(); treeElement;
+           treeElement = treeElement.nextSibling)
+        treeElement.onpopulate();
+    }
+    var highlightTreeElement = null;
+    for (var section of this._styleSidebarPane.allSections()) {
+      var treeElement = section.propertiesTreeOutline.firstChild();
+      while (treeElement && !highlightTreeElement) {
+        if (treeElement.property === this._cssProperty) {
+          highlightTreeElement = treeElement;
+          break;
+        }
+        treeElement = treeElement.traverseNextTreeElement(false, null, true);
+      }
+      if (highlightTreeElement)
+        break;
+    }
+
+    if (!highlightTreeElement)
+      return;
+
+    highlightTreeElement.parent.expand();
+    highlightTreeElement.listItemElement.scrollIntoViewIfNeeded();
+    highlightTreeElement.listItemElement.animate(
+        [
+          {offset: 0, backgroundColor: 'rgba(255, 255, 0, 0.2)'},
+          {offset: 0.1, backgroundColor: 'rgba(255, 255, 0, 0.7)'}, {offset: 1, backgroundColor: 'transparent'}
+        ],
+        {duration: 2000, easing: 'cubic-bezier(0, 0, 0.2, 1)'});
+  }
+};