[Views] Add a capability to the bubble delegate to be able to show the title in BaseFont.

ui/views/bubble/bubble_delegate.cc

Index: ui/views/bubble/bubble_delegate.cc
diff --git a/ui/views/bubble/bubble_delegate.cc b/ui/views/bubble/bubble_delegate.cc
index 0b890eca5d0ff4ef21d8eaf1cc65f5d3a8076ced..8e10e79e30b85ead7d02608133b881c0190395f5 100644
--- a/ui/views/bubble/bubble_delegate.cc
+++ b/ui/views/bubble/bubble_delegate.cc
@@ -131,6 +131,8 @@ View* BubbleDelegateView::GetContentsView() {
 NonClientFrameView* BubbleDelegateView::CreateNonClientFrameView(
     Widget* widget) {
   BubbleFrameView* frame = new BubbleFrameView(margins());
+  if (ShouldShowWindowTitleInBaseFont())
+    frame->ShowTitleInBaseFont();
   BubbleBorder::Arrow adjusted_arrow = arrow();
   if (base::i18n::IsRTL())
     adjusted_arrow = BubbleBorder::horizontal_mirror(adjusted_arrow);
@@ -177,6 +179,10 @@ void BubbleDelegateView::OnWidgetBoundsChanged(Widget* widget,
     SizeToContents();
 }
 
+bool BubbleDelegateView::ShouldShowWindowTitleInBaseFont() const {
+  return false;
+}
+
 View* BubbleDelegateView::GetAnchorView() const {
   return ViewStorage::GetInstance()->RetrieveView(anchor_view_storage_id_);
 }