Fixes missing 5 pixel inset for theme background in Ash

ash/wm/frame_painter.h

Index: ash/wm/frame_painter.h
diff --git a/ash/wm/frame_painter.h b/ash/wm/frame_painter.h
index bf727eabcf0817f9385f264ced7d69a2f3b78968..57045e3c4de21967b4a64ad3394183720ddf1639 100644
--- a/ash/wm/frame_painter.h
+++ b/ash/wm/frame_painter.h
@@ -83,6 +83,9 @@ class ASH_EXPORT FramePainter : public aura::WindowObserver,
   // Returns the inset from the right edge.
   int GetRightInset() const;
 
+  // Returns the amount that the theme background should be inset.
+  int GetThemeBackgroundXInset() const;
+
   // Paints the frame header.
   void PaintHeader(views::NonClientFrameView* view,
                    gfx::Canvas* canvas,