Ash: Use right edge of screen to scroll maximized windows

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 5be8ca14652a5b4b6a14dde0657dabac4b1f5976..4835f14235a9fcb226f4c6bc545060947a9187a8 100644
--- a/ash/wm/frame_painter.h
+++ b/ash/wm/frame_painter.h
@@ -31,6 +31,13 @@ namespace ash {
 // layout constants for Ash window frames.
 class ASH_EXPORT FramePainter {
  public:
+  // Ash windows do not have a traditional visible window frame.  Window content
+  // extends to the edge of the window.  We consider a small region outside the
+  // window bounds and an even smaller region overlapping the window to be the
+  // "non-client" area and use it for resizing.
+  static const int kResizeOutsideBoundsSize;
+  static const int kResizeInsideBoundsSize;
+
   FramePainter();
   ~FramePainter();