Content settings lists moved to sub-sub pages.

chrome/browser/resources/options/options_page.css

 body {
   -webkit-user-select: none;
   cursor: default;
   font-size: 100%;
 }
 
 #settings-title {
   -webkit-padding-end: 24px;
   color: #53637d;
   font-size: 200%;
@@ skipping 260 matching lines @@
   padding: 5px;
   height: 21px;
   vertical-align: middle;
   width: 24px;
 }
 
 #managed-prefs-text {
   vertical-align: middle;
 }
 
-.page > h1 {
+.page h1 {
   -webkit-padding-end: 24px;
   border-bottom: 1px solid #eeeeee;
   color: #53637d;
   font-size: 200%;
   font-weight: normal;
   margin: 0;
   padding-bottom: 4px;
   padding-top: 13px;
 }
 
-.subpage-sheet .page > h1 {
+.subpage-sheet .page h1 {
   padding-top: 4px;
 }
 
 section {
   -webkit-box-orient: horizontal;
   border-bottom: 1px solid #eeeeee;
   display: -webkit-box;
   margin-top: 17px;
   padding-bottom: 20px;
 }
@@ skipping 52 matching lines @@
 
 .text-button {
   background-color: transparent;
   border-color: transparent;
 }
 
 #contentSettingsPage :invalid {
   background-color: pink;
 }
 
+.framed-list {
+  border: 1px solid #d9d9d9;
+  border-radius: 2px;
+}
+
 list > * {
   -webkit-box-align: center;
   -webkit-transition: .15s background-color;
   box-sizing: border-box;
   border-radius: 0px;
   display: -webkit-box;
   height: 32px;
   border: none;
   margin: 0;
 }
@@ skipping 133 matching lines @@
 }
 
 .suboption {
   -webkit-margin-start: 16px;
 }
 
 html[os=mac] label > input[type=checkbox],
 html[os=mac] label > input[type=radio] {
   margin-top: 2px;
 }