DevTools: migrate ResourcesPanel icons over to UI.Icon

third_party/WebKit/Source/devtools/front_end/ui/treeoutline.js

 /*
  * Copyright (C) 2007 Apple 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 593 matching lines @@
 
     if (typeof x === 'string') {
       this._titleElement.textContent = x;
       this.tooltip = x;
     } else {
       this._titleElement = x;
       this.tooltip = '';
     }
 
     this._listItemNode.removeChildren();
-    if (this._iconElement)
-      this._listItemNode.appendChild(this._iconElement);
     if (this._leadingIconsElement)
       this._listItemNode.appendChild(this._leadingIconsElement);
     this._listItemNode.appendChild(this._titleElement);
     if (this._trailingIconsElement)
       this._listItemNode.appendChild(this._trailingIconsElement);
     this._ensureSelection();
   }
 
   /**
    * @return {string}
    */
   titleAsText() {
     if (!this._title)
       return '';
     if (typeof this._title === 'string')
       return this._title;
     return this._title.textContent;
   }
 
   /**
    * @param {!UI.InplaceEditor.Config} editingConfig
    */
   startEditingTitle(editingConfig) {
     UI.InplaceEditor.startEditing(this._titleElement, editingConfig);
     this.treeOutline._shadowRoot.getSelection().setBaseAndExtent(this._titleElement, 0, this._titleElement, 1);
   }
 
-  createIcon() {

[dgozman, 2017/01/30 16:47:52]

Nice!

-    if (!this._iconElement) {
-      this._iconElement = createElementWithClass('div', 'icon');
-      this._listItemNode.insertBefore(this._iconElement, this._listItemNode.firstChild);
-      this._ensureSelection();
-    }
-  }
-
   /**
    * @param {!Array<!UI.Icon>} icons
    */
   setLeadingIcons(icons) {
     if (!this._leadingIconsElement && !icons.length)
       return;
     if (!this._leadingIconsElement) {
       this._leadingIconsElement = createElementWithClass('div', 'leading-icons');
       this._leadingIconsElement.classList.add('icons-container');
       this._listItemNode.insertBefore(this._leadingIconsElement, this._titleElement);
@@ skipping 543 matching lines @@
     var paddingLeftValue = window.getComputedStyle(this._listItemNode).paddingLeft;
     console.assert(paddingLeftValue.endsWith('px'));
     var computedLeftPadding = parseFloat(paddingLeftValue);
     var left = this._listItemNode.totalOffsetLeft() + computedLeftPadding;
     return event.pageX >= left && event.pageX <= left + UI.TreeElement._ArrowToggleWidth && this._expandable;
   }
 };
 
 /** @const */
 UI.TreeElement._ArrowToggleWidth = 10;