[DevTools] Remove preventFollow and special checks for links throughout frontend.

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 691 matching lines @@
   _treeElementToggled(event) {
     var element = event.currentTarget;
     if (element.treeElement !== this || element.hasSelection())
       return;
 
     var toggleOnClick = this.toggleOnClick && !this.selectable;
     var isInTriangle = this.isEventWithinDisclosureTriangle(event);
     if (!toggleOnClick && !isInTriangle)
       return;
 
-    if (event.target && event.target.enclosingNodeOrSelfWithNodeName('a'))
-      return;
-
     if (this.expanded) {
       if (event.altKey)
         this.collapseRecursively();
       else
         this.collapse();
     } else {
       if (event.altKey)
         this.expandRecursively();
       else
         this.expand();
@@ skipping 389 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 + TreeElement._ArrowToggleWidth && this._expandable;
   }
 };
 
 /** @const */
 TreeElement._ArrowToggleWidth = 10;