Set relayoutChildren to 'true' only if size change happens in Table

Source/core/rendering/compositing/GraphicsLayerTreeBuilder.cpp

Index: Source/core/rendering/compositing/GraphicsLayerTreeBuilder.cpp
diff --git a/Source/core/rendering/compositing/GraphicsLayerTreeBuilder.cpp b/Source/core/rendering/compositing/GraphicsLayerTreeBuilder.cpp
index c0358877e2e092eafc79a5f5379ccc1e2b3009f4..d99f45f91aeb1276eaa696a9f92df639af8cf0c5 100644
--- a/Source/core/rendering/compositing/GraphicsLayerTreeBuilder.cpp
+++ b/Source/core/rendering/compositing/GraphicsLayerTreeBuilder.cpp
@@ -69,14 +69,13 @@ void GraphicsLayerTreeBuilder::rebuild(RenderLayer& layer, AncestorInfo info)
 
     layer.stackingNode()->updateLayerListsIfNeeded();
 
-    const bool hasCompositedLayerMapping = layer.hasCompositedLayerMapping();
     CompositedLayerMapping* currentCompositedLayerMapping = layer.compositedLayerMapping();
 
     // If this layer has a compositedLayerMapping, then that is where we place subsequent children GraphicsLayers.
     // Otherwise children continue to append to the child list of the enclosing layer.
     GraphicsLayerVector layerChildren;
     AncestorInfo infoForChildren(info);
-    if (hasCompositedLayerMapping) {
+    if (currentCompositedLayerMapping) {
         infoForChildren.childLayersOfEnclosingCompositedLayer = &layerChildren;
         infoForChildren.enclosingCompositedLayer = &layer;
     }
@@ -91,7 +90,7 @@ void GraphicsLayerTreeBuilder::rebuild(RenderLayer& layer, AncestorInfo info)
             rebuild(*curNode->layer(), infoForChildren);
 
         // If a negative z-order child is compositing, we get a foreground layer which needs to get parented.
-        if (hasCompositedLayerMapping && currentCompositedLayerMapping->foregroundLayer())
+        if (currentCompositedLayerMapping && currentCompositedLayerMapping->foregroundLayer())
             infoForChildren.childLayersOfEnclosingCompositedLayer->append(currentCompositedLayerMapping->foregroundLayer());
     }
 
@@ -99,7 +98,7 @@ void GraphicsLayerTreeBuilder::rebuild(RenderLayer& layer, AncestorInfo info)
     while (RenderLayerStackingNode* curNode = iterator.next())
         rebuild(*curNode->layer(), infoForChildren);
 
-    if (hasCompositedLayerMapping) {
+    if (currentCompositedLayerMapping) {
         bool parented = false;
         if (layer.renderer()->isRenderPart())
             parented = RenderLayerCompositor::parentFrameContentLayers(toRenderPart(layer.renderer()));
@@ -131,11 +130,14 @@ void GraphicsLayerTreeBuilder::rebuild(RenderLayer& layer, AncestorInfo info)
             info.childLayersOfEnclosingCompositedLayer->append(currentCompositedLayerMapping->childForSuperlayers());
     }
 
-    if (layer.scrollParent()
-        && layer.scrollParent()->hasCompositedLayerMapping()
-        && layer.scrollParent()->compositedLayerMapping()->needsToReparentOverflowControls()
-        && layer.scrollParent()->scrollableArea()->topmostScrollChild() == &layer)
-        info.childLayersOfEnclosingCompositedLayer->append(layer.scrollParent()->compositedLayerMapping()->detachLayerForOverflowControls(*info.enclosingCompositedLayer));
+    if (!layer.scrollParent())
+        return;
+
+    CompositedLayerMapping* scrollParentCompositedLayerMapping = layer.scrollParent()->compositedLayerMapping();
+    if (layer.scrollParent()->scrollableArea()->topmostScrollChild() == &layer
+        &&scrollParentCompositedLayerMapping
+        && scrollParentCompositedLayerMapping->needsToReparentOverflowControls())
+        info.childLayersOfEnclosingCompositedLayer->append(scrollParentCompositedLayerMapping->detachLayerForOverflowControls(*info.enclosingCompositedLayer));
 }
 
 }