Convert location bar bubble delegates to bubble dialog delegates

ui/views/widget/widget_delegate.cc

Index: ui/views/widget/widget_delegate.cc
diff --git a/ui/views/widget/widget_delegate.cc b/ui/views/widget/widget_delegate.cc
index e62aa92847e67feb742e9451dda687b6fd920ac3..f10e840d3983078554df12b484fdaf3567ae4457 100644
--- a/ui/views/widget/widget_delegate.cc
+++ b/ui/views/widget/widget_delegate.cc
@@ -32,15 +32,19 @@ void WidgetDelegate::OnWorkAreaChanged() {
 }
 
 View* WidgetDelegate::GetInitiallyFocusedView() {
-  return NULL;
+  return nullptr;
 }
 
 BubbleDelegateView* WidgetDelegate::AsBubbleDelegate() {
-  return NULL;
+  return nullptr;
+}
+
+BubbleDialogDelegateView* WidgetDelegate::AsBubbleDialogDelegate() {
+  return nullptr;
 }
 
 DialogDelegate* WidgetDelegate::AsDialogDelegate() {
-  return NULL;
+  return nullptr;
 }
 
 bool WidgetDelegate::CanResize() const {