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

ui/views/bubble/bubble_frame_view.h

Index: ui/views/bubble/bubble_frame_view.h
diff --git a/ui/views/bubble/bubble_frame_view.h b/ui/views/bubble/bubble_frame_view.h
index 4d56032dff93b1243c96a42985873f2d63991311..a17a4f8f487eede0823a540e7654ceee3544b2cd 100644
--- a/ui/views/bubble/bubble_frame_view.h
+++ b/ui/views/bubble/bubble_frame_view.h
@@ -12,6 +12,10 @@
 #include "ui/views/controls/button/button.h"
 #include "ui/views/window/non_client_view.h"
 
+namespace gfx {
+class FontList;
+}
+
 namespace views {
 
 class Label;
@@ -43,6 +47,10 @@ class VIEWS_EXPORT BubbleFrameView : public NonClientFrameView,
   virtual void UpdateWindowIcon() OVERRIDE;
   virtual void UpdateWindowTitle() OVERRIDE;
 
+  // Set the FontList to be used for the title of the bubble.
+  // Caller must arrange to update the layout to have the call take effect.
+  void SetTitleFontList(const gfx::FontList& font_list);
+
   // View overrides:
   virtual gfx::Insets GetInsets() const OVERRIDE;
   virtual gfx::Size GetPreferredSize() const OVERRIDE;