Merge ContentDistributor into ElementShadow

Source/core/dom/ContainerNodeAlgorithms.cpp

Index: Source/core/dom/ContainerNodeAlgorithms.cpp
diff --git a/Source/core/dom/ContainerNodeAlgorithms.cpp b/Source/core/dom/ContainerNodeAlgorithms.cpp
index 59d65ed55340ad3ec3cde2bd642bd37d7b21bdf0..0235f1c3d13e460c8f3429c4669a64803ed8e8a0 100644
--- a/Source/core/dom/ContainerNodeAlgorithms.cpp
+++ b/Source/core/dom/ContainerNodeAlgorithms.cpp
@@ -28,10 +28,20 @@
 
 #include "core/dom/Element.h"
 #include "core/dom/shadow/ElementShadow.h"
+#include "core/dom/shadow/ShadowRoot.h"
 #include "core/html/HTMLFrameOwnerElement.h"
 
 namespace WebCore {
 
+class ShadowRootVector : public Vector<RefPtr<ShadowRoot> > {
+public:
+    explicit ShadowRootVector(ElementShadow* tree)
+    {
+        for (ShadowRoot* root = tree->youngestShadowRoot(); root; root = root->olderShadowRoot())
+            append(root);
+    }
+};
+
 void ChildNodeInsertionNotifier::notifyDescendantInsertedIntoDocument(ContainerNode* node)
 {
     ChildNodesLazySnapshot snapshot(node);