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 989cee9d2e3a411f3fd869609955c99650b5fd2e..c4ba85cc89a5d036515f691fa1f5b8a23407bf1c 100644
--- a/Source/core/rendering/RenderLayer.cpp
+++ b/Source/core/rendering/RenderLayer.cpp
@@ -3789,7 +3789,7 @@ 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() || diff.needsLayout());
         compositor()->setNeedsUpdateCompositingRequirementsState();
     }
 
@@ -3798,12 +3798,12 @@ 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);
     }