WebLocalFrameImpl::printPage needs to ensure layout, style, and compositing are up-to-date

Source/core/rendering/RenderLayer.h

Index: Source/core/rendering/RenderLayer.h
diff --git a/Source/core/rendering/RenderLayer.h b/Source/core/rendering/RenderLayer.h
index b0e62d8f13c7d607c1c62d3bb48dd59f9f58ce94..31575e5a025f7369f3143240aa96e15e15203dad 100644
--- a/Source/core/rendering/RenderLayer.h
+++ b/Source/core/rendering/RenderLayer.h
@@ -482,9 +482,7 @@ public:
     void didUpdateCompositingInputs();
 
     const AncestorDependentCompositingInputs& ancestorDependentCompositingInputs() const { ASSERT(!m_needsAncestorDependentCompositingInputsUpdate); return m_ancestorDependentCompositingInputs; }
-
-    // FIXME: This function should ASSERT(!m_needsDescendantDependentCompositingInputsUpdate).
-    const DescendantDependentCompositingInputs& descendantDependentCompositingInputs() const { return m_descendantDependentCompositingInputs; }
+    const DescendantDependentCompositingInputs& descendantDependentCompositingInputs() const { ASSERT(!m_needsDescendantDependentCompositingInputsUpdate); return m_descendantDependentCompositingInputs; }
 
     IntRect clippedAbsoluteBoundingBox() const { return ancestorDependentCompositingInputs().clippedAbsoluteBoundingBox; }
     const RenderLayer* opacityAncestor() const { return ancestorDependentCompositingInputs().opacityAncestor; }