Make the compositing assert disabler for paint invalidation more targeted.

Source/core/rendering/compositing/RenderLayerCompositor.cpp

Index: Source/core/rendering/compositing/RenderLayerCompositor.cpp
diff --git a/Source/core/rendering/compositing/RenderLayerCompositor.cpp b/Source/core/rendering/compositing/RenderLayerCompositor.cpp
index 0d39968d532ac8a46fc5299e2f0ac6c0c2979914..bc0241a2111bcd24a4fada99a4a39f7adcb735cc 100644
--- a/Source/core/rendering/compositing/RenderLayerCompositor.cpp
+++ b/Source/core/rendering/compositing/RenderLayerCompositor.cpp
@@ -474,6 +474,11 @@ void RenderLayerCompositor::paintInvalidationOnCompositingChange(RenderLayer* la
     if (layer->renderer() != &m_renderView && !layer->renderer()->parent())
         return;
 
+    // For querying RenderLayer::compositingState()
+    // Eager invalidation here is correct, since we are invalidating with respect to the previous frame's
+    // compositing state when changing the compositing backing of the layer.
+    DisableCompositingQueryAsserts disabler;
+
     layer->paintInvalidator().paintInvalidationIncludingNonCompositingDescendants();
 }