Display a warning when autofill is disabled for a website.

chrome/renderer/autofill_helper.cc

Index: chrome/renderer/autofill_helper.cc
diff --git a/chrome/renderer/autofill_helper.cc b/chrome/renderer/autofill_helper.cc
index 2832f0dbaa83f61e744f2dc04047f1f6b1bc579d..e5974738f818271969e675b4c58e41e1e26e3ee0 100644
--- a/chrome/renderer/autofill_helper.cc
+++ b/chrome/renderer/autofill_helper.cc
@@ -54,7 +54,8 @@ AutoFillHelper::AutoFillHelper(RenderView* render_view)
       suggestions_options_index_(-1) {
 }
 
-void AutoFillHelper::QueryAutoFillSuggestions(const WebNode& node) {
+void AutoFillHelper::QueryAutoFillSuggestions(const WebNode& node,
+                                              bool autofill_disabled) {
   static int query_counter = 0;
   autofill_query_id_ = query_counter++;
   autofill_query_node_ = node;
@@ -72,7 +73,8 @@ void AutoFillHelper::QueryAutoFillSuggestions(const WebNode& node) {
 
   bool field_autofilled = NodeIsAutoFilled(node);
   render_view_->Send(new ViewHostMsg_QueryFormFieldAutoFill(
-      render_view_->routing_id(), autofill_query_id_, field_autofilled, field));
+      render_view_->routing_id(), autofill_query_id_, field_autofilled, field,
+      autofill_disabled));
 }
 
 void AutoFillHelper::RemoveAutocompleteSuggestion(
@@ -123,7 +125,7 @@ void AutoFillHelper::SuggestionsReceived(int query_id,
   // items, identified by |unique_ids| having at least one valid value.
   bool show_options = false;
   for (size_t i = 0; i < ids.size(); ++i) {
-    if (ids[i] != 0) {
+    if (ids[i] > 0) {
       show_options = true;
       break;
     }
@@ -226,33 +228,29 @@ void AutoFillHelper::FrameDetached(WebFrame* frame) {
 }
 
 void AutoFillHelper::TextDidChangeInTextField(const WebInputElement& element) {
-  ShowSuggestions(element, false, true);
+  ShowSuggestions(element, false, true, false);
 }
 
 bool AutoFillHelper::InputElementClicked(const WebInputElement& element,
                                          bool was_focused,
                                          bool is_focused) {
   if (was_focused)
-    ShowSuggestions(element, true, false);
+    ShowSuggestions(element, true, false, true);
   return false;
 }
 
-
-void AutoFillHelper::ShowSuggestions(
-    const WebInputElement& const_element,
-    bool autofill_on_empty_values,
-    bool requires_caret_at_end) {
-  // We need to call non-const methods.
-  WebInputElement element(const_element);
-  if (!element.isEnabledFormControl() ||
-      !element.isText() ||
-      element.isPasswordField() ||
-      !element.autoComplete() || element.isReadOnly()) {
+void AutoFillHelper::ShowSuggestions(const WebInputElement& element,
+                                     bool autofill_on_empty_values,
+                                     bool requires_caret_at_end,
+                                     bool display_warning_if_disabled) {
+  bool autofill_disabled = !element.isEnabledFormControl() ||
+      !element.isText() || element.isPasswordField() ||
+      !element.autoComplete() || element.isReadOnly();
+  if (autofill_disabled && !display_warning_if_disabled)
     return;
-  }
 
-  WebString name = element.nameForAutofill();
-  if (name.isEmpty())  // If the field has no name, then we won't have values.
+  // If the field has no name, then we won't have values.
+  if (element.nameForAutofill().isEmpty())
     return;
 
   // Don't attempt to autofill with values that are too large.
@@ -265,11 +263,10 @@ void AutoFillHelper::ShowSuggestions(
 
   if (requires_caret_at_end &&
       (element.selectionStart() != element.selectionEnd() ||
-       element.selectionEnd() != static_cast<int>(value.length()))) {
+       element.selectionEnd() != static_cast<int>(value.length())))
     return;
-  }
 
-  QueryAutoFillSuggestions(element);
+  QueryAutoFillSuggestions(element, autofill_disabled);
 }
 
 void AutoFillHelper::QueryAutoFillFormData(const WebNode& node,