DevTools: Remove contain: paint from split widgets

third_party/WebKit/Source/devtools/front_end/ui/splitWidget.css

 /*
  * Copyright (C) 2011 Google 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.
  *
@@ skipping 21 matching lines @@
 
 .shadow-split-widget {
     display: flex;
     overflow: hidden;
 }
 
 .shadow-split-widget-contents {
     display: flex;
     position: relative;
     flex-direction: column;
-    contain: strict;
+    contain: layout size style;
 }
 
 .shadow-split-widget-sidebar {
     flex: none;
 }
 
 .shadow-split-widget-main, .shadow-split-widget-sidebar.maximized {
     flex: auto;
 }
 
@@ skipping 37 matching lines @@
 
 .shadow-split-widget.hbox > .shadow-split-widget-sidebar:not(.maximized) {
     border: 0;
     border-left: 1px solid rgb(64%, 64%, 64%);
 }
 
 .shadow-split-widget.hbox.shadow-split-widget-first-is-sidebar > .shadow-split-widget-sidebar:not(.maximized) {
     border: 0;
     border-right: 1px solid rgb(64%, 64%, 64%);
 }