Display a warning when autofill is disabled for a website.

chrome/browser/autocomplete_history_manager.h

Index: chrome/browser/autocomplete_history_manager.h
diff --git a/chrome/browser/autocomplete_history_manager.h b/chrome/browser/autocomplete_history_manager.h
index 23493b39daabd7321aa180a6ce38135406217020..5752942c698488df7268ca47d5075b12e2193274 100644
--- a/chrome/browser/autocomplete_history_manager.h
+++ b/chrome/browser/autocomplete_history_manager.h
@@ -28,8 +28,7 @@ class AutocompleteHistoryManager
 
   // RenderViewHostDelegate::Autocomplete implementation.
   virtual void FormSubmitted(const webkit_glue::FormData& form);
-  virtual bool GetAutocompleteSuggestions(int query_id,
-                                          const string16& name,
+  virtual void GetAutocompleteSuggestions(const string16& name,
                                           const string16& prefix);
   virtual void RemoveAutocompleteEntry(const string16& name,
                                        const string16& value);
@@ -59,7 +58,6 @@ class AutocompleteHistoryManager
   // is queried on another thread, we record the query handle until we
   // get called back.
   WebDataService::Handle pending_query_handle_;
-  int query_id_;
 
   DISALLOW_COPY_AND_ASSIGN(AutocompleteHistoryManager);
 };