Remove unused parameter to RenderLayerCompositor::setCompositingLayersNeedRebuild

Source/core/rendering/compositing/RenderLayerCompositor.h

Index: Source/core/rendering/compositing/RenderLayerCompositor.h
diff --git a/Source/core/rendering/compositing/RenderLayerCompositor.h b/Source/core/rendering/compositing/RenderLayerCompositor.h
index 117c752234b77d29779ddc25da5e1b3f58060be4..e6bde525cd8061ff086283270640954b603f04d2 100644
--- a/Source/core/rendering/compositing/RenderLayerCompositor.h
+++ b/Source/core/rendering/compositing/RenderLayerCompositor.h
@@ -84,7 +84,7 @@ public:
 
     // Called when the layer hierarchy needs to be updated (compositing layers have been
     // created, destroyed or re-parented).
-    void setCompositingLayersNeedRebuild(bool needRebuild = true);
+    void setCompositingLayersNeedRebuild();
     bool compositingLayersNeedRebuild() const { return m_compositingLayersNeedRebuild; }
 
     // Updating properties required for determining if compositing is necessary.