Add compositing, layers to app_list_demo

ui/gfx/nine_image_painter.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/gfx/nine_image_painter.h"
 
 #include <limits>
 
 #include "third_party/skia/include/core/SkPaint.h"
 #include "third_party/skia/include/core/SkRect.h"
 #include "third_party/skia/include/core/SkScalar.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/geometry/rect_conversions.h"
 #include "ui/gfx/geometry/safe_integer_conversions.h"
 #include "ui/gfx/image/image_skia_operations.h"
 #include "ui/gfx/insets.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/scoped_canvas.h"
 #include "ui/gfx/skia_util.h"
 
+#include "base/debug/stack_trace.h"
+
 namespace gfx {
 
 namespace {
 
 // The following functions width and height of the image in pixels for the
 // scale factor in the Canvas.
 int ImageWidthInPixels(const ImageSkia& i, Canvas* c) {
   return i.GetRepresentation(c->image_scale()).pixel_width();
 }
 
@@ skipping 62 matching lines @@
                              const Rect& bounds,
                              const uint8 alpha) {
   if (IsEmpty())
     return;
 
   ScopedCanvas scoped_canvas(canvas);
   canvas->Translate(bounds.OffsetFromOrigin());
 
   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
   // to draw the images at the correct locations.
   // We should not scale the bounds by the canvas->image_scale() as that can be
   // different from the real scale in the canvas transform.
   SkMatrix matrix = canvas->sk_canvas()->getTotalMatrix();
   SkRect scaled_rect;
   matrix.mapRect(&scaled_rect, RectToSkRect(bounds));
 
@@ skipping 35 matching lines @@
        scaled_height - i2h - i8h, paint);
   canvas->DrawImageIntInPixel(images_[6], 0, 0, i6w, i6h, 0,
                               scaled_height - i6h, i6w, i6h, false, paint);
   Fill(canvas, images_[7], i6w, scaled_height - i7h, scaled_width - i6w - i8w,
        i7h, paint);
   canvas->DrawImageIntInPixel(images_[8], 0, 0, i8w, i8h, scaled_width - i8w,
                               scaled_height - i8h, i8w, i8h, false, paint);
 }
 
 }  // namespace gfx