[DevTools] Get rid of floats in treeoutline.

third_party/WebKit/Source/devtools/front_end/sources/navigatorView.css

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2009 Anthony Ricaud <rik@webkit.org>
  *
  * 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.
@@ skipping 38 matching lines @@
 }
 
 .navigator-other-tree-item .icon {
     content: url(Images/resourcePlainIcon.png);
 }
 
 .navigator > ol {
     min-width: 100%;
     min-height: 100%;
     display: inline-block;
-    position: relative
+    position: relative;
 }
 
 .navigator li {
     height: 18px;
     line-height: 17px;
     white-space: nowrap;
+    padding-right: 3px;
 }
 
 .navigator :focus li.selected {
     color: white;
 }
 
 .navigator > ol.being-edited li.selected .selection {
     background-color: rgb(56, 121, 217);
 }
 
 .navigator > ol.being-edited li.selected {
     overflow: visible;
 }
 
 .navigator .icon {
     width: 16px;
     height: 16px;
-    float: left;
+    margin-top: -2px;
+    position: relative;
+    top: 3px;
 }
 
 .navigator .base-navigator-tree-element-title {
     display: inline-block;
     position: relative;
     padding-left: 2px;
 }
 
 .navigator .base-navigator-tree-element-title.editing {
     margin: auto;
 }
 
 .navigator-tabbed-pane {
     flex: auto;
 }
 
 .navigator-tabbed-pane .navigator {
     padding-left: 0;
     transform: translateZ(0);
 }