DevTools: traverse widget hierarchy to reveal views.

third_party/WebKit/Source/devtools/front_end/sources/sourcesPanel.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 215 matching lines @@
     text-overflow: ellipsis;
     overflow: hidden;
 }
 
 .scope-chain-sidebar-pane-section-title {
     font-weight: normal;
     word-wrap: break-word;
     white-space: normal;
 }
 
-.scope-chain-sidebar-pane-section {
-    padding: 2px 4px 2px 4px;
-}
-
 .scope-chain-sidebar-pane-section-subtitle {
     float: right;
     margin-left: 5px;
     max-width: 55%;
     text-overflow: ellipsis;
     overflow: hidden;
 }
 
 .scope-chain-sidebar-pane-section-title {
     font-weight: normal;
     word-wrap: break-word;
     white-space: normal;
 }
 
 .scope-chain-sidebar-pane-section {
     padding: 2px 4px 2px 4px;
-    overflow: hidden;
 }
 
 .hidden-callframes-message {
     text-align: center;
     font-style: italic;
     padding: 4px;
     color: #888;
     background-color: #FFFFC2;
 }