Remove background obscuration checks.

sky/engine/core/rendering/RenderImage.h

Index: sky/engine/core/rendering/RenderImage.h
diff --git a/sky/engine/core/rendering/RenderImage.h b/sky/engine/core/rendering/RenderImage.h
index 829bd7fb97ebe01e42b4a1862db155161b2b402a..e99976d4a341f4e1dd839458ebc139d8701a5b1b 100644
--- a/sky/engine/core/rendering/RenderImage.h
+++ b/sky/engine/core/rendering/RenderImage.h
@@ -68,16 +68,10 @@ private:
 
     virtual void paintReplaced(PaintInfo&, const LayoutPoint&) override;
 
-    virtual bool foregroundIsKnownToBeOpaqueInRect(const LayoutRect& localRect, unsigned maxDepthToTest) const override final;
-    virtual bool computeBackgroundIsKnownToBeObscured() override final;
-
     virtual LayoutUnit minimumReplacedHeight() const override;
 
-    virtual void notifyFinished(Resource*) override final;
     virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) override final;
 
-    virtual bool boxShadowShouldBeAppliedToBackground(BackgroundBleedAvoidance, InlineFlowBox*) const override final;
-
     void updateIntrinsicSizeIfNeeded(const LayoutSize& newSize);
     // Update the size of the image to be rendered. Object-fit may cause this to be different from the CSS box's content rect.
     void updateInnerContentRect();