WIP: Move StyleEngine::m_activeTreeScopes to TreeScope::m_childTreeScopesWithActiveStyleSheets

Source/core/dom/shadow/ShadowRoot.cpp

Index: Source/core/dom/shadow/ShadowRoot.cpp
diff --git a/Source/core/dom/shadow/ShadowRoot.cpp b/Source/core/dom/shadow/ShadowRoot.cpp
index 79445bdca87a62a1c8755efad57944da994e67ca..df8660f33b6a876650c40b41000cf8fae14f6973 100644
--- a/Source/core/dom/shadow/ShadowRoot.cpp
+++ b/Source/core/dom/shadow/ShadowRoot.cpp
@@ -190,6 +190,9 @@ void ShadowRoot::removedFrom(ContainerNode* insertionPoint)
         }
     }
 
+    if (selfOrDescendantsHaveActiveStyleSheets())
+        clearSelfOrDescendantsHaveActiveStyleSheets();
+
     DocumentFragment::removedFrom(insertionPoint);
 }