DevTools: migrate last usages of samllIcons.png to UI.Icon

third_party/WebKit/Source/devtools/front_end/accessibility/AXTreePane.js

Index: third_party/WebKit/Source/devtools/front_end/accessibility/AXTreePane.js
diff --git a/third_party/WebKit/Source/devtools/front_end/accessibility/AXTreePane.js b/third_party/WebKit/Source/devtools/front_end/accessibility/AXTreePane.js
index f56fdaa3b88a092616a7451cb62892b9f3d2608a..6f50e907782da7bd01f11823322efb6a51e57f87 100644
--- a/third_party/WebKit/Source/devtools/front_end/accessibility/AXTreePane.js
+++ b/third_party/WebKit/Source/devtools/front_end/accessibility/AXTreePane.js
@@ -176,6 +176,11 @@ Accessibility.AXNodeTreeElement = class extends TreeElement {
    */
   setInspected(inspected) {
     this._inspected = inspected;
+    if (this._inspected)
+      this.setTrailingIcons([UI.Icon.create('smallicon-thick-left-arrow')]);
+    else
+      this.setTrailingIcons([]);
+
     this.listItemElement.classList.toggle('inspected', this._inspected);
   }
 
@@ -211,28 +216,28 @@ Accessibility.AXNodeTreeElement = class extends TreeElement {
   }
 
   _update() {
-    this.listItemElement.removeChildren();
+    this.titleElement().removeChildren();
 
     if (this._axNode.ignored()) {
       this._appendIgnoredNodeElement();
     } else {
       this._appendRoleElement(this._axNode.role());
       if (this._axNode.name().value) {
-        this.listItemElement.createChild('span', 'separator').textContent = '\u00A0';
+        this.titleElement().createChild('span', 'separator').textContent = '\u00A0';
         this._appendNameElement(/** @type {string} */ (this._axNode.name().value));
       }
     }
 
     if (this._axNode.hasOnlyUnloadedChildren()) {
-      this.listItemElement.classList.add('children-unloaded');
+      this.titleElement().classList.add('children-unloaded');
       this.setExpandable(true);
     } else {
       this.setExpandable(!!this._axNode.numChildren());
     }
 
     if (!this._axNode.isDOMNode())
-      this.listItemElement.classList.add('no-dom-node');
-    this.listItemElement.appendChild(this._inspectNodeButton.element);
+      this.titleElement().classList.add('no-dom-node');
+    this.titleElement().appendChild(this._inspectNodeButton.element);
   }
 
   /**
@@ -265,7 +270,7 @@ Accessibility.AXNodeTreeElement = class extends TreeElement {
     var nameElement = createElement('span');
     nameElement.textContent = '"' + name + '"';
     nameElement.classList.add('ax-readable-string');
-    this.listItemElement.appendChild(nameElement);
+    this.titleElement().appendChild(nameElement);
   }
 
   /**
@@ -279,14 +284,14 @@ Accessibility.AXNodeTreeElement = class extends TreeElement {
     roleElement.classList.add(Accessibility.AXNodeTreeElement.RoleStyles[role.type]);
     roleElement.setTextContentTruncatedIfNeeded(role.value || '');
 
-    this.listItemElement.appendChild(roleElement);
+    this.titleElement().appendChild(roleElement);
   }
 
   _appendIgnoredNodeElement() {
     var ignoredNodeElement = createElementWithClass('span', 'monospace');
     ignoredNodeElement.textContent = Common.UIString('Ignored');
     ignoredNodeElement.classList.add('ax-tree-ignored-node');
-    this.listItemElement.appendChild(ignoredNodeElement);
+    this.titleElement().appendChild(ignoredNodeElement);
   }
 
   /**
@@ -359,7 +364,7 @@ Accessibility.AXNodeTreeParentElement = class extends Accessibility.AXNodeTreeEl
     if (this._treePane.isExpanded(this._axNode.backendDOMNodeId()))
       this.listItemElement.classList.add('siblings-expanded');
     if (this._axNode.numChildren() > 1)
-      this.listItemElement.insertBefore(this._expandSiblingsButton.element, this._inspectNodeButton.element);
+      this.titleElement().insertBefore(this._expandSiblingsButton.element, this._inspectNodeButton.element);
   }
 
   /**