Index: Source/core/rendering/RenderBox.h |
diff --git a/Source/core/rendering/RenderBox.h b/Source/core/rendering/RenderBox.h |
index 6ccc65f14bc4c175580bde28af3c0dcfea405b08..de6884d2c81d3e360fcc4f7858a82236ff819cb0 100644 |
--- a/Source/core/rendering/RenderBox.h |
+++ b/Source/core/rendering/RenderBox.h |
@@ -631,7 +631,8 @@ protected: |
virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) OVERRIDE; |
virtual void updateFromStyle() OVERRIDE; |
- LayoutRect backgroundPaintedExtent() const; |
+ // Returns false if it could not cheaply compute the extent (e.g. fixed background), in which case the returned rect may be incorrect. |
+ bool getBackgroundPaintedExtent(LayoutRect&) const; |
virtual bool foregroundIsKnownToBeOpaqueInRect(const LayoutRect& localRect, unsigned maxDepthToTest) const; |
virtual bool computeBackgroundIsKnownToBeObscured() OVERRIDE; |