Add "previewing on hover" support for single-field autocomplete input

chrome/browser/ui/autofill/autofill_popup_controller_impl.cc

Index: chrome/browser/ui/autofill/autofill_popup_controller_impl.cc
diff --git a/chrome/browser/ui/autofill/autofill_popup_controller_impl.cc b/chrome/browser/ui/autofill/autofill_popup_controller_impl.cc
index e7cc9dd6b46a241a090f50647f025f7c66854df6..d4d3d99b94cbce95d21d715b35e3a16b5fcbf678 100644
--- a/chrome/browser/ui/autofill/autofill_popup_controller_impl.cc
+++ b/chrome/browser/ui/autofill/autofill_popup_controller_impl.cc
@@ -446,10 +446,17 @@ void AutofillPopupControllerImpl::SetSelectedLine(int selected_line) {
 
   selected_line_ = selected_line;
 
-  if (selected_line_ != kNoSelection)
-    delegate_->DidSelectSuggestion(identifiers_[selected_line_]);
-  else
+  if (selected_line_ != kNoSelection) {
+    if ((identifiers_[selected_line_] ==
+         WebAutofillClient::MenuItemIDAutocompleteEntry) &&
+        (selected_line_ < static_cast<int>(names_.size())))
+      delegate_->DidSelectAutocompleteSuggestion(names_[selected_line_]);
+    else
+      delegate_->DidSelectSuggestion(identifiers_[selected_line_]);
+  } else {
     delegate_->ClearPreviewedForm();
+    delegate_->ClearAutocompletePreviewedField();
+  }
 }
 
 void AutofillPopupControllerImpl::SelectNextLine() {
@@ -520,6 +527,7 @@ bool AutofillPopupControllerImpl::RemoveSelectedLine() {
 
   if (HasSuggestions()) {
     delegate_->ClearPreviewedForm();
+    delegate_->ClearAutocompletePreviewedField();
     UpdateBoundsAndRedrawPopup();
   } else {
     Hide();