Fix an issue in checkbox handler to enable extension.

chrome/browser/resources/extensions/extension_list.js

Index: chrome/browser/resources/extensions/extension_list.js
diff --git a/chrome/browser/resources/extensions/extension_list.js b/chrome/browser/resources/extensions/extension_list.js
index 7adab1e3d308fda4a3c4f9830637f5a8b31fa7a7..16fe4cc1826823e56b48840abe6a79c7b68e5887 100644
--- a/chrome/browser/resources/extensions/extension_list.js
+++ b/chrome/browser/resources/extensions/extension_list.js
@@ -547,10 +547,11 @@ cr.define('extensions', function() {
       });
 
       // The 'Enabled' checkbox.
-      wrapper.setupColumn('enabled', '.enable-checkbox input', 'change',
+      wrapper.setupColumn('enabled', '.enable-checkbox input', 'click',
                           function(e) {
         var checked = e.target.checked;
-        // TODO(devlin): What should we do if this fails?

[Devlin, 2016/04/27 13:52:01]

nit: I think this isn't entirely addressed - the state is accurate, but we don't
surface any kind of error to the user, etc.  It just looks totally broken then. 
So let's go ahead and leave in the TODO.

[lazyboy, 2016/04/27 22:12:55]

Ah, got it.
I've also updated the document to say we want to show some kind of error to the
user.
Done.

+        // Even if this fails, e.preventDefault() call below would keep stuff
+        // consistent.
         chrome.management.setEnabled(extension.id, checked);
 
         // This may seem counter-intuitive (to not set/clear the checkmark)