Sky should use an SkPicture when drawing

sky/compositor/display_delegate_bitmap.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 "sky/compositor/display_delegate_bitmap.h"
-
-#include "sky/compositor/layer_client.h"
-#include "third_party/skia/include/core/SkBitmapDevice.h"
-#include "third_party/skia/include/core/SkCanvas.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);
-}
-
-void DisplayDelegateBitmap::GetPixelsForTesting(std::vector<unsigned char>* pixels) {
-  gfx::PNGCodec::EncodeBGRASkBitmap(bitmap_, true, pixels);
-}
-
-void DisplayDelegateBitmap::Paint(mojo::GaneshSurface& surface, const gfx::Rect& size) {
-  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);
-
-  client_->PaintContents(&canvas, size);
-  canvas.flush();
-}
-
-}  // namespace sky