Implement Harmony spec for dialog/bubble borders.

ui/views/bubble/bubble_border.h

Index: ui/views/bubble/bubble_border.h
diff --git a/ui/views/bubble/bubble_border.h b/ui/views/bubble/bubble_border.h
index c2d874559f2f18c75f2181c99d1fd7ff1a36d218..98af8670ce08762d6b3aea55419f807caaeeeb9d 100644
--- a/ui/views/bubble/bubble_border.h
+++ b/ui/views/bubble/bubble_border.h
@@ -182,7 +182,7 @@ class VIEWS_EXPORT BubbleBorder : public Border {
   void set_arrow_offset(int offset) { arrow_offset_ = offset; }
 
   // Sets the way the arrow is actually painted.  Default is PAINT_NORMAL.
-  void set_paint_arrow(ArrowPaintType value) { arrow_paint_type_ = value; }
+  void set_paint_arrow(ArrowPaintType value);
 
   // Get the desired widget bounds (in screen coordinates) given the anchor rect
   // and bubble content size; calculated from shadow and arrow image dimensions.
@@ -229,6 +229,8 @@ class VIEWS_EXPORT BubbleBorder : public Border {
                                    SkPath* path) const;
   void DrawArrow(gfx::Canvas* canvas, const gfx::Rect& arrow_bounds) const;
 
+  void PaintMd(const View& view, gfx::Canvas* canvas);
+
   internal::BorderImages* GetImagesForTest() const;
 
   Arrow arrow_;