Sky should use an SkPicture when drawing

sky/compositor/rasterizer_bitmap.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
+// Copyright 2015 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 "sky/compositor/display_delegate_bitmap.h"
+#include "sky/compositor/rasterizer_bitmap.h"
 
 #include "sky/compositor/layer_client.h"
+#include "sky/compositor/layer_host.h"
 #include "third_party/skia/include/core/SkBitmapDevice.h"
 #include "third_party/skia/include/core/SkCanvas.h"
+#include "third_party/skia/include/core/SkPicture.h"
 #include "ui/gfx/codec/png_codec.h"
 #include "ui/gfx/geometry/rect.h"
 
 namespace sky {
 
-DisplayDelegateBitmap::DisplayDelegateBitmap(LayerClient* client)
-  : client_(client) {}
-
-DisplayDelegateBitmap::~DisplayDelegateBitmap() {}
-
-DisplayDelegate* DisplayDelegateBitmap::create(LayerClient* client) {
-  return new DisplayDelegateBitmap(client);
+RasterizerBitmap::RasterizerBitmap(LayerHost* host) : host_(host) {
+  DCHECK(host_);
 }
 
-void DisplayDelegateBitmap::GetPixelsForTesting(std::vector<unsigned char>* pixels) {
+RasterizerBitmap::~RasterizerBitmap() {
+}
+
+void RasterizerBitmap::GetPixelsForTesting(std::vector<unsigned char>* pixels) {
   gfx::PNGCodec::EncodeBGRASkBitmap(bitmap_, true, pixels);
 }
 
-void DisplayDelegateBitmap::Paint(mojo::GaneshSurface& surface, const gfx::Rect& size) {
+scoped_ptr<mojo::GLTexture> RasterizerBitmap::Rasterize(SkPicture* picture) {
+  auto size = picture->cullRect();
   bitmap_.allocN32Pixels(size.width(), size.height());
+
   SkBitmapDevice device(bitmap_);
   SkCanvas canvas(&device);
   // Draw red so we can see when we fail to paint.
   canvas.drawColor(SK_ColorRED);
+  canvas.drawPicture(picture);
+  canvas.flush();
 
-  client_->PaintContents(&canvas, size);
-  canvas.flush();
+  return host_->resource_manager()->CreateTexture(
+      gfx::Size(size.width(), size.height()));
 }
 
 }  // namespace sky