Refactor Instant web UI (chrome://settings page).

chrome/browser/resources/options/pref_ui.js

Index: chrome/browser/resources/options/pref_ui.js
diff --git a/chrome/browser/resources/options/pref_ui.js b/chrome/browser/resources/options/pref_ui.js
index 16af4d0231cbca3ba89434fb804a25f074865f43..fe7c51a57c77812a10140d63aa5b2785a2caf7e5 100644
--- a/chrome/browser/resources/options/pref_ui.js
+++ b/chrome/browser/resources/options/pref_ui.js
@@ -98,6 +98,8 @@ cr.define('options', function() {
       this.addEventListener(
           'change',
           function(e) {
+            if (self.customChangeHandler && self.customChangeHandler(e))

[Evan Stade, 2011/07/25 23:01:34]

if you make this a function of PrefCheckbox that has a default stub
implementation that just returns false, then you won't have to check if it
exists and (more importantly) you will have a place to add documentation.

[sreeram, 2011/07/25 23:56:42]

Done.

+              return;
             var value = self.inverted_pref ? !self.checked : self.checked;
             switch(self.valueType) {
               case 'number':