Remove zoom() and effectiveZoom().

sky/engine/core/rendering/style/StylePendingImage.h

Index: sky/engine/core/rendering/style/StylePendingImage.h
diff --git a/sky/engine/core/rendering/style/StylePendingImage.h b/sky/engine/core/rendering/style/StylePendingImage.h
index 9329074e722641c5f2acbb8bab9c31fe1dd8fa5e..3910b20bf6f5b2327b8a8c992370e95ba046e6ef 100644
--- a/sky/engine/core/rendering/style/StylePendingImage.h
+++ b/sky/engine/core/rendering/style/StylePendingImage.h
@@ -51,12 +51,12 @@ public:
     CSSCursorImageValue* cssCursorImageValue() const { return m_value->isCursorImageValue() ? toCSSCursorImageValue(m_value) : 0; }
     CSSImageSetValue* cssImageSetValue() const { return m_value->isImageSetValue() ? toCSSImageSetValue(m_value) : 0; }
 
-    virtual LayoutSize imageSize(const RenderObject*, float /*multiplier*/) const override { return LayoutSize(); }
+    virtual LayoutSize imageSize(const RenderObject*) const override { return LayoutSize(); }
     virtual bool imageHasRelativeWidth() const override { return false; }
     virtual bool imageHasRelativeHeight() const override { return false; }
     virtual void computeIntrinsicDimensions(const RenderObject*, Length& /* intrinsicWidth */ , Length& /* intrinsicHeight */, FloatSize& /* intrinsicRatio */) override { }
     virtual bool usesImageContainerSize() const override { return false; }
-    virtual void setContainerSizeForRenderer(const RenderObject*, const IntSize&, float) override { }
+    virtual void setContainerSizeForRenderer(const RenderObject*, const IntSize&) override { }
     virtual void addClient(RenderObject*) override { }
     virtual void removeClient(RenderObject*) override { }
     virtual PassRefPtr<Image> image(RenderObject*, const IntSize&) const override