Prevent querying of restricted query values.

chrome/test/data/instant_extended.html

Index: chrome/test/data/instant_extended.html
diff --git a/chrome/test/data/instant_extended.html b/chrome/test/data/instant_extended.html
index 1e9ce07993133cb8d7c20ffc2dc02e3ae905d7b5..6f2f163e26ba44910cdcea4f95ecc496006f9c09 100644
--- a/chrome/test/data/instant_extended.html
+++ b/chrome/test/data/instant_extended.html
@@ -32,6 +32,10 @@ function getNewTabPageHandle() {
 }
 
 function handleNativeSuggestions() {
+  // Apparently, one needs to access nativeSuggestions before
+  // apiHandle.setRestrictedValue can work.

[Jered, 2013/03/05 17:47:44]

Can you explain a bit more? We should document or fix this behavior.

[robertshield, 2013/03/05 18:19:04]

apiHandle.setRestrictedValue ends up in
SearchBoxExtensionWrapper::SetQueryFromAutocompleteResult which calls
SearchBox::GetAutocompleteResultWithId. 

This last accesses a list called last_autocomplete_results_ which is set only
when SearchBox::GetAutocompleteResults is called.

I added a comment to searchbox_api.js to this effect, let me know if you'd
prefer a more detailed comment somewhere else.

+  var foo = apiHandle.nativeSuggestions;
+
   // Showing the loader at 100% height.
   apiHandle.show(2 /* QUERY_SUGGESTIONS */);
 }