Sky should use an SkPicture when drawing

examples/sky_compositor_app/sky_compositor_app.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 "base/macros.h"
 #include "mojo/application/application_runner_chromium.h"
 #include "mojo/public/c/system/main.h"
 #include "mojo/public/cpp/application/application_connection.h"
 #include "mojo/public/cpp/application/application_delegate.h"
 #include "mojo/public/cpp/application/application_impl.h"
 #include "mojo/services/view_manager/public/cpp/view.h"
 #include "mojo/services/view_manager/public/cpp/view_manager.h"
 #include "mojo/services/view_manager/public/cpp/view_manager_client_factory.h"
 #include "mojo/services/view_manager/public/cpp/view_manager_delegate.h"
-#include "sky/compositor/display_delegate_ganesh.h"
 #include "sky/compositor/layer.h"
 #include "sky/compositor/layer_host.h"
+#include "sky/compositor/rasterizer_ganesh.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 
 namespace examples {
 namespace {
 
 gfx::Size ToSize(const mojo::Rect& rect) {
   return gfx::Size(rect.width, rect.height);
 }
 
 int RadiusAt(base::TimeDelta delta) {
   return 50 + (delta.InMilliseconds() % 6000) * 100 / 6000;
 }
 }
 
 class SkyCompositorApp : public mojo::ApplicationDelegate,
                          public mojo::ViewManagerDelegate,
                          public sky::LayerClient,
                          public sky::LayerHostClient {
  public:
   SkyCompositorApp() : shell_(nullptr), view_(nullptr) {}
   virtual ~SkyCompositorApp() {}
 
   void Initialize(mojo::ApplicationImpl* app) override {
     shell_ = app->shell();
     view_manager_client_factory_.reset(
         new mojo::ViewManagerClientFactory(app->shell(), this));
-
-    sky::DisplayDelegate::setDisplayDelegateCreateFunction(
-        sky::DisplayDelegateGanesh::create);
   }
 
   bool ConfigureIncomingConnection(
       mojo::ApplicationConnection* connection) override {
     connection->AddService(view_manager_client_factory_.get());
     return true;
   }
 
   void OnEmbed(mojo::View* root,
                mojo::ServiceProviderImpl* exported_services,
                scoped_ptr<mojo::ServiceProvider> imported_services) override {
     view_ = root;
     base_time_ = base::TimeTicks::Now();
 
     layer_host_.reset(new sky::LayerHost(this));
     root_layer_ = make_scoped_refptr(new sky::Layer(this));
+    root_layer_->set_rasterizer(
+        make_scoped_ptr(new sky::RasterizerGanesh(layer_host_.get())));
     layer_host_->SetRootLayer(root_layer_);
     layer_host_->SetNeedsAnimate();
   }
 
   void OnViewManagerDisconnected(mojo::ViewManager* view_manager) override {
     mojo::ApplicationImpl::Terminate();
   }
 
  private:
   // sky::LayerHostClient
@@ skipping 34 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(SkyCompositorApp);
 };
 
 }  // namespace examples
 
 MojoResult MojoMain(MojoHandle handle) {
   mojo::ApplicationRunnerChromium runner(new examples::SkyCompositorApp);
   return runner.Run(handle);
 }