Separate repaint and layout requirements of StyleDifference (Step 1)

Source/core/rendering/RenderLayer.cpp

Index: Source/core/rendering/RenderLayer.cpp
diff --git a/Source/core/rendering/RenderLayer.cpp b/Source/core/rendering/RenderLayer.cpp
index 64569c78984db8e5fa00d1806b104a7616b113f3..050ef1c21cd0a0eee2230fa634e6bd91d9862624 100644
--- a/Source/core/rendering/RenderLayer.cpp
+++ b/Source/core/rendering/RenderLayer.cpp
@@ -3839,7 +3839,7 @@ void RenderLayer::styleChanged(StyleDifference diff, const RenderStyle* oldStyle
         m_scrollableArea->updateAfterStyleChange(oldStyle);
 
     if (!oldStyle || oldStyle->visibility() != renderer()->style()->visibility()) {
-        ASSERT(!oldStyle || diff >= StyleDifferenceRepaint);
+        ASSERT(!oldStyle || diff.needsRepaint());
         compositor()->setNeedsUpdateCompositingRequirementsState();
     }
 
@@ -3848,12 +3848,12 @@ void RenderLayer::styleChanged(StyleDifference diff, const RenderStyle* oldStyle
     updateSelfPaintingLayer();
 
     if (!oldStyle || renderer()->style()->position() != oldStyle->position()) {
-        ASSERT(!oldStyle || diff >= StyleDifferenceLayout);
+        ASSERT(!oldStyle || diff.needsFullLayout());
         updateOutOfFlowPositioned(oldStyle);
     }
 
     if (!oldStyle || !renderer()->style()->reflectionDataEquivalent(oldStyle)) {
-        ASSERT(!oldStyle || diff >= StyleDifferenceLayout);
+        ASSERT(!oldStyle || diff.needsFullLayout());
         updateReflectionInfo(oldStyle);
     }