RenderLayerScrollableArea::updateResizerStyle shouldn't do work if there's no resizer

Source/core/rendering/RenderLayerScrollableArea.cpp

Index: Source/core/rendering/RenderLayerScrollableArea.cpp
diff --git a/Source/core/rendering/RenderLayerScrollableArea.cpp b/Source/core/rendering/RenderLayerScrollableArea.cpp
index 82ca8532c9a99d4b8449bf055e41d00f6aa71b64..683c72a88b2bb21f457f44fcf7adec13a81654f1 100644
--- a/Source/core/rendering/RenderLayerScrollableArea.cpp
+++ b/Source/core/rendering/RenderLayerScrollableArea.cpp
@@ -1223,6 +1223,9 @@ void RenderLayerScrollableArea::updateResizerAreaSet()
 
 void RenderLayerScrollableArea::updateResizerStyle()
 {
+    if (!m_resizer && !m_box->canResize())
+        return;
+
     RenderObject* actualRenderer = rendererForScrollbar(m_box);
     RefPtr<RenderStyle> resizer = m_box->hasOverflowClip() ? actualRenderer->getUncachedPseudoStyle(PseudoStyleRequest(RESIZER), actualRenderer->style()) : PassRefPtr<RenderStyle>(nullptr);
     if (resizer) {