Add compositing, layers to app_list_demo

ui/gfx/nine_image_painter.cc

Index: ui/gfx/nine_image_painter.cc
diff --git a/ui/gfx/nine_image_painter.cc b/ui/gfx/nine_image_painter.cc
index 24a3e3b3627f422f9ea4ce67346edeb7d64b0380..731e82baf7a692f701cc528b198a09b6290a3351 100644
--- a/ui/gfx/nine_image_painter.cc
+++ b/ui/gfx/nine_image_painter.cc
@@ -18,6 +18,8 @@
 #include "ui/gfx/scoped_canvas.h"
 #include "ui/gfx/skia_util.h"
 
+#include "base/debug/stack_trace.h"
+
 namespace gfx {
 
 namespace {
@@ -100,6 +102,7 @@ void NineImagePainter::Paint(Canvas* canvas,
 
   SkPaint paint;
   paint.setAlpha(alpha);
+  base::debug::StackTrace().Print();
 
   // Get the current transform from the canvas and apply it to the logical
   // bounds passed in. This will give us the pixel bounds which can be used