WIP: diff which plumbs through the event URL.

extensions/renderer/resources/binding.js

Index: extensions/renderer/resources/binding.js
diff --git a/extensions/renderer/resources/binding.js b/extensions/renderer/resources/binding.js
index 1ceb2defbfd1d5a70dd682a48fda4f30ede6ae00..86332274b8a2e93d731a0aae33aafc333a9e8e0d 100644
--- a/extensions/renderer/resources/binding.js
+++ b/extensions/renderer/resources/binding.js
@@ -432,7 +432,8 @@ Binding.prototype = {
 
     if (!success) {
       // If an API was available it should have been successfully generated.
-      logging.DCHECK(!GetAvailability(schema.namespace).is_available);
+      var availability = GetAvailability(schema.namespace);
+      logging.DCHECK(!availability.is_available);
       console.error('chrome.' + schema.namespace + ' is not available: ' +
                     availability.message);
       return;