Content settings lists moved to sub-sub pages.

chrome/browser/resources/options/content_settings.css

 /*
 Copyright (c) 2010 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.
 */
 
 .exceptionPattern {
   -webkit-box-flex: 1;
   display: -webkit-box;
   overflow: hidden;
   white-space: nowrap;
 }
 
 .exceptionSetting {
   display: inline-block;
   width: 100px;
   margin-right: 20px;
 }
+
+#exceptionColumnHeaders {
+  display: -webkit-box;
+  margin-bottom: 4px;
+  margin-top: 17px;
+  -webkit-margin-start: 3px;
+}
+
+#exceptionColumnHeaders > div {
+  font-weight: bold;
+}
+
+#exceptionPatternColumn {
+  -webkit-box-flex: 1;
+}
+
+#exceptionBehaviorColumn {
+  width: 140px;
+}