Start removing enum ui::ResourceBundle::FontStyle, fix MacViews font sizes

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 5e30b98694a5a4760385970dd2635c2cf374afb6..a18c08888d20d3a2d1154053073c25be19b34327 100644
--- a/ui/views/bubble/bubble_delegate.cc
+++ b/ui/views/bubble/bubble_delegate.cc
@@ -6,6 +6,7 @@
 
 #include "build/build_config.h"
 #include "ui/accessibility/ax_view_state.h"
+#include "ui/base/default_style.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/color_utils.h"
 #include "ui/gfx/geometry/rect.h"
@@ -301,10 +302,9 @@ gfx::Rect BubbleDelegateView::GetBubbleBounds() {
 
 const gfx::FontList& BubbleDelegateView::GetTitleFontList() const {
   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
-  return rb.GetFontList(ui::ResourceBundle::MediumFont);
+  return rb.GetFontListWithDelta(ui::kTitleFontSizeDelta);
 }
 
-
 void BubbleDelegateView::UpdateColorsFromTheme(const ui::NativeTheme* theme) {
   if (!color_explicitly_set_)
     color_ = theme->GetSystemColor(ui::NativeTheme::kColorId_BubbleBackground);