Fix broken AttachContext from r152289

Source/core/dom/shadow/ElementShadow.cpp

Index: Source/core/dom/shadow/ElementShadow.cpp
diff --git a/Source/core/dom/shadow/ElementShadow.cpp b/Source/core/dom/shadow/ElementShadow.cpp
index 807aeabab367dea09b26da69ddc729063c0ecc0d..2e988ee0ab78aeedb2595db42ec8879d0a025bdc 100644
--- a/Source/core/dom/shadow/ElementShadow.cpp
+++ b/Source/core/dom/shadow/ElementShadow.cpp
@@ -72,21 +72,27 @@ void ElementShadow::removeAllShadowRoots()
     m_distributor.invalidateDistribution(shadowHost);
 }
 
-void ElementShadow::attach()
+void ElementShadow::attach(const Node::AttachContext& context)
 {
     ContentDistributor::ensureDistribution(host());
 
+    Node::AttachContext childrenContext(context);
+    childrenContext.resolvedStyle = 0;
+
     for (ShadowRoot* root = youngestShadowRoot(); root; root = root->olderShadowRoot()) {
         if (!root->attached())
-            root->attach();
+            root->attach(childrenContext);
     }
 }
 
-void ElementShadow::detach()
+void ElementShadow::detach(const Node::AttachContext& context)
 {
+    Node::AttachContext childrenContext(context);
+    childrenContext.resolvedStyle = 0;
+
     for (ShadowRoot* root = youngestShadowRoot(); root; root = root->olderShadowRoot()) {
         if (root->attached())
-            root->detach();
+            root->detach(childrenContext);
     }
 }