Drastically reduce the number of redraws when editing content settings.

chrome/browser/resources/options/content_settings.js

Index: chrome/browser/resources/options/content_settings.js
diff --git a/chrome/browser/resources/options/content_settings.js b/chrome/browser/resources/options/content_settings.js
index a9a80bb3d56b5bccd526949fdd10e4d193501511..46af5315fee1538a2f9781213dc0185345cfbd70 100644
--- a/chrome/browser/resources/options/content_settings.js
+++ b/chrome/browser/resources/options/content_settings.js
@@ -99,10 +99,7 @@ cr.define('options', function() {
                                ' list[mode=normal]');
 
     exceptionsList.reset();
-    for (var i = 0; i < list.length; i++) {
-      exceptionsList.addException(list[i]);
-    }
-    exceptionsList.redraw();
+    exceptionsList.addExceptions(list);

[arv (Not doing code reviews), 2011/01/12 00:42:32]

You could also have used startBatchUpdates() and endBatchUpdates()

   };
 
   ContentSettings.setOTRExceptions = function(type, list) {
@@ -113,10 +110,7 @@ cr.define('options', function() {
     exceptionsList.parentNode.classList.remove('hidden');
 
     exceptionsList.reset();
-    for (var i = 0; i < list.length; i++) {
-      exceptionsList.addException(list[i]);
-    }
-    exceptionsList.redraw();
+    exceptionsList.addExceptions(list);
   };
 
   /**