Create a new views_aura_desktop.

aura/window.cc

Index: aura/window.cc
===================================================================
--- aura/window.cc	(revision 98234)
+++ aura/window.cc	(working copy)
@@ -9,17 +9,15 @@
 #include "aura/desktop.h"
 #include "aura/window_delegate.h"
 #include "base/logging.h"
-#include "third_party/skia/include/core/SkCanvas.h"
+#include "ui/gfx/canvas_skia.h"
 #include "ui/gfx/compositor/compositor.h"
 #include "ui/gfx/compositor/layer.h"
 
 namespace aura {
 
-// TODO: do we need to support child windows?
-Window::Window(Desktop* desktop)
-    : delegate_(NULL),
+Window::Window(WindowDelegate* delegate)
+    : delegate_(delegate),
       visibility_(VISIBILITY_HIDDEN),
-      layer_(new ui::Layer(desktop->compositor())),
       needs_paint_all_(true),
       parent_(NULL),
       id_(-1) {
@@ -28,6 +26,10 @@
 Window::~Window() {
 }
 
+void Window::Init() {
+  layer_.reset(new ui::Layer(Desktop::GetInstance()->compositor()));
+}
+
 void Window::SetVisibility(Visibility visibility) {
   if (visibility_ == visibility)
     return;
@@ -51,12 +53,19 @@
 
 void Window::SetCanvas(const SkCanvas& canvas, const gfx::Point& origin) {
   // TODO: figure out how this is going to work when animating the layer. In
-  // particular if we're animating the size then the underyling Texture is going
+  // particular if we're animating the size then the underlying Texture is going
   // to be unhappy if we try to set a texture on a size bigger than the size of
   // the texture.
   layer_->SetCanvas(canvas, origin);
 }
 
+void Window::SetParent(Window* parent) {
+  if (parent)
+    parent->AddChild(this);
+  else
+    Desktop::GetInstance()->window()->AddChild(this);
+}
+
 void Window::DrawTree() {
   UpdateLayerCanvas();
   Draw();
@@ -96,8 +105,13 @@
   dirty_rect_.SetRect(0, 0, 0, 0);
   if (dirty_rect.IsEmpty())
     return;
-  if (delegate_)
-    delegate_->OnPaint(dirty_rect);
+  if (delegate_) {
+    scoped_ptr<gfx::Canvas> canvas(gfx::Canvas::CreateCanvas(
+        dirty_rect.width(), dirty_rect.height(), false));
+    canvas->TranslateInt(dirty_rect.x(), dirty_rect.y());
+    delegate_->OnPaint(canvas.get());
+    SetCanvas(*canvas->AsCanvasSkia(), bounds().origin());
+  }
 }
 
 void Window::Draw() {