Add Sky framework support for drawing images

sky/engine/core/painting/Canvas.cpp

 // 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/engine/config.h"
 #include "sky/engine/core/painting/Canvas.h"
 
 #include "sky/engine/core/dom/Document.h"
 #include "sky/engine/core/dom/Element.h"
+#include "sky/engine/core/painting/CanvasImage.h"
 #include "sky/engine/core/painting/PaintingTasks.h"
 #include "sky/engine/platform/geometry/IntRect.h"
 #include "third_party/skia/include/core/SkCanvas.h"
+#include "third_party/skia/include/core/SkBitmap.h"
 
 namespace blink {
 
 Canvas::Canvas(const FloatSize& size)
     : m_size(size)
 {
     m_displayList = adoptRef(new DisplayList);
     m_canvas = m_displayList->beginRecording(expandedIntSize(m_size));
 }
 
@@ skipping 125 matching lines @@
 void Canvas::drawPath(const CanvasPath* path, const Paint* paint)
 {
     if (!m_canvas)
         return;
     ASSERT(path);
     ASSERT(paint);
     ASSERT(m_displayList->isRecording());
     m_canvas->drawPath(path->path(), paint->paint());
 }
 
+void Canvas::drawImage(const CanvasImage* image, float x, float y, const Paint* paint)
+{
+    if (!m_canvas)
+        return;
+    ASSERT(image);
+    ASSERT(m_displayList->isRecording());
+    m_canvas->drawBitmap(image->bitmap(), x, y, &paint->paint());
+}
+
 PassRefPtr<DisplayList> Canvas::finishRecording()
 {
     if (!isRecording())
         return nullptr;
     m_canvas = nullptr;
     m_displayList->endRecording();
     return m_displayList.release();
 }
 
 } // namespace blink