Need to reset enclosingPaginationLayer when a RenderLayer is removed from the tree.

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 0f135d3588e9d45dae43856a9782ce5ec12f7086..d15929777a14d4fba054ea05e926cd9dd24bed31 100644
--- a/Source/core/rendering/RenderLayer.cpp
+++ b/Source/core/rendering/RenderLayer.cpp
@@ -535,6 +535,13 @@ void RenderLayer::updatePagination()
     }
 }
 
+void RenderLayer::clearPaginationRecursive()

[chrishtr, 2014/11/21 18:40:06]

No caller for this method?

[mstensho (USE GERRIT), 2014/11/21 20:38:22]

Oops.. that was what the code I added further down in this file was supposed to
do. But I managed to type updatePaginationRecursive() instead.

Done.

+{
+    m_enclosingPaginationLayer = 0;
+    for (RenderLayer* child = firstChild(); child; child = child->nextSibling())
+        child->clearPaginationRecursive();
+}
+
 LayoutPoint RenderLayer::positionFromPaintInvalidationBacking(const RenderObject* renderObject, const RenderLayerModelObject* paintInvalidationContainer, const PaintInvalidationState* paintInvalidationState)
 {
     FloatPoint point = renderObject->localToContainerPoint(FloatPoint(), paintInvalidationContainer, 0, 0, paintInvalidationState);
@@ -1239,6 +1246,9 @@ RenderLayer* RenderLayer::removeChild(RenderLayer* oldChild)
     if (oldChild->m_hasVisibleContent || oldChild->m_hasVisibleDescendant)
         dirtyAncestorChainVisibleDescendantStatus();
 
+    if (oldChild->enclosingPaginationLayer())
+        oldChild->updatePaginationRecursive();
+
     return oldChild;
 }