[DevTools] Get rid of floats in treeoutline.

third_party/WebKit/Source/devtools/front_end/accessibility/accessibilityNode.css

 /*
  * Copyright 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.
  */
 
 .ax-computed-text {
     padding: 3px 5px 0;
     background-image: url(Images/speech.png);
     background-repeat: no-repeat;
@@ skipping 18 matching lines @@
     border-bottom: 1px solid #BFBFBF;
 }
 
 .ax-name {
     color: rgb(136, 19, 145);
     flex-shrink: 0;
 }
 
 .ax-readable-name {
     flex-shrink: 0;
+    padding-left: 2px;
 }
 
 .ax-readable-string {
     font-style: italic;
 }
 
 span.ax-role {
     font-weight: bold;
 }
 
 span.ax-internal-role {
     font-style: italic;
 }
 
 .ax-ignored-info {
     padding: 6px;
 }
 
 .ax-ignored-node-pane {
     background-color: hsl(0, 0%, 96%);
 }
 
 .tree-outline li {
-    padding-top: 5px;
+    padding-left: 1px;
 }
 
 .tree-outline li.invalid {
     position: relative;
     left: -2px;
     text-decoration: line-through;
 }
 
 .tree-outline label[is=dt-icon-label] {
     position: relative;
     left: -11px;
 }
 
 span.ax-value-undefined {
     font-style: italic;
 }
 
 .ax-value-source-unused {
     opacity: 0.5;
 }
 
 .ax-value-source-superseded,
 .ax-value-source-invalid {
     text-decoration: line-through;
 }
 
 .tree-outline label[is=dt-icon-label] + .ax-name {
     margin-left: -11px;
 }