Improve accessibility of user image selection screen.

chrome/browser/resources/options2/content_settings.css

Index: chrome/browser/resources/options2/content_settings.css
diff --git a/chrome/browser/resources/options2/content_settings.css b/chrome/browser/resources/options2/content_settings.css
index d6249f3f39602fd8302ac081edd62f19806bf413..747948d3969a7f2a98ec7781a21bc0570cc63c20 100644
--- a/chrome/browser/resources/options2/content_settings.css
+++ b/chrome/browser/resources/options2/content_settings.css
@@ -56,25 +56,25 @@ select.exception-setting {
   margin: 7px 0;
 }
 
-div[role='listitem'][managedby] {
+div[role='option'][managedby] {
   color: #666;
   font-style: italic;
   position: relative;
 }
 
-.settings-list div[role='listitem'][managedby='policy'],
-.settings-list div[role='listitem'][managedby='extension'] {
+.settings-list div[role='option'][managedby='policy'],
+.settings-list div[role='option'][managedby='extension'] {
   background: -webkit-linear-gradient(rgb(250, 230, 146), rgb(250, 230, 146));
   border-bottom: 1px solid rgb(201, 189, 141);
   border-top: 0;
 }
 
-list div[role='listitem'][managedby='policy'] .close-button {
+list div[role='option'][managedby='policy'] .close-button {
   background-image: url('chrome://theme/IDR_MANAGED');
   opacity: 1;
 }
 
-list div[role='listitem'][managedby='extension'] .close-button {
+list div[role='option'][managedby='extension'] .close-button {
   background-image: url('chrome://theme/IDR_EXTENSIONS_SECTION_SMALL');
   opacity: 1;
 }