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

chrome/browser/ui/autofill/autofill_dialog_controller_impl.cc

Index: chrome/browser/ui/autofill/autofill_dialog_controller_impl.cc
diff --git a/chrome/browser/ui/autofill/autofill_dialog_controller_impl.cc b/chrome/browser/ui/autofill/autofill_dialog_controller_impl.cc
index db0ef1073aeb0762c2bab5f090ec49d47f918635..c5d1d711b8382c64e8e9216331970af4bab23d80 100644
--- a/chrome/browser/ui/autofill/autofill_dialog_controller_impl.cc
+++ b/chrome/browser/ui/autofill/autofill_dialog_controller_impl.cc
@@ -2154,6 +2154,11 @@ void AutofillDialogControllerImpl::DidSelectSuggestion(int identifier) {
   // TODO(estade): implement.
 }
 
+void AutofillDialogControllerImpl::DidSelectAutocompleteSuggestion(
+    const base::string16& value) {
+  // No operation required.
+}
+
 void AutofillDialogControllerImpl::DidAcceptSuggestion(
     const base::string16& value,
     int identifier) {
@@ -2233,6 +2238,10 @@ void AutofillDialogControllerImpl::ClearPreviewedForm() {
   // TODO(estade): implement.
 }
 
+void AutofillDialogControllerImpl::ClearAutocompletePreviewedField() {
+  // No operation required.
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // content::NotificationObserver implementation.