Fix display list canvas not rendering correctly on high dpi displays

Source/platform/graphics/ImageBufferSurface.h

Index: Source/platform/graphics/ImageBufferSurface.h
diff --git a/Source/platform/graphics/ImageBufferSurface.h b/Source/platform/graphics/ImageBufferSurface.h
index d67fb33cee519cd751d8c1048f76ed0484a90362..ad55079a06f7d68590c02ee0b5dfc888a42e2412 100644
--- a/Source/platform/graphics/ImageBufferSurface.h
+++ b/Source/platform/graphics/ImageBufferSurface.h
@@ -33,6 +33,7 @@
 
 #include "platform/PlatformExport.h"
 #include "platform/geometry/IntSize.h"
+#include "platform/graphics/GraphicsTypes.h"
 #include "platform/graphics/GraphicsTypes3D.h"
 #include "wtf/FastAllocBase.h"
 #include "wtf/Noncopyable.h"
@@ -48,6 +49,7 @@ namespace blink {
 class ImageBuffer;
 class WebLayer;
 class FloatRect;
+class GraphicsContext;
 
 enum OpacityMode {
     NonOpaque,
@@ -80,6 +82,7 @@ public:
     virtual void finalizeFrame(const FloatRect &dirtyRect) { }
     virtual void willDrawVideo() { }
     virtual PassRefPtr<SkImage> newImageSnapshot() const;
+    virtual void draw(GraphicsContext*, const FloatRect& destRect, const FloatRect& srcRect, CompositeOperator, WebBlendMode, bool needsCopy);
 
     OpacityMode opacityMode() const { return m_opacityMode; }
     const IntSize& size() const { return m_size; }