Add support for SVG Clip paths in HTML

Source/core/svg/SVGClipPathElement.cpp

Index: Source/core/svg/SVGClipPathElement.cpp
diff --git a/Source/core/svg/SVGClipPathElement.cpp b/Source/core/svg/SVGClipPathElement.cpp
index 4de9d37af7a77d7f5b95606563cd4b34c9f1efb8..3daef1d0834af3a9ce4a1a36e97f789552794b2c 100644
--- a/Source/core/svg/SVGClipPathElement.cpp
+++ b/Source/core/svg/SVGClipPathElement.cpp
@@ -90,7 +90,26 @@ void SVGClipPathElement::childrenChanged(const ChildrenChange& change)
 
 RenderObject* SVGClipPathElement::createRenderer(RenderStyle*)
 {
-    return new RenderSVGResourceClipper(this);
+    RenderSVGResourceClipper* renderer = new RenderSVGResourceClipper(this);
+
+    WillBeHeapHashSet<RefPtrWillBeMember<Node> >::iterator layerEnd = m_clientsToAdd.end();
+    for (WillBeHeapHashSet<RefPtrWillBeMember<Node> >::iterator it = m_clientsToAdd.begin(); it != layerEnd; ++it)
+        renderer->addClientRenderLayer(it->get());
+    m_clientsToAdd.clear();
+
+    return renderer;
+}
+
+void SVGClipPathElement::addClient(Node* client)
+{
+    ASSERT(client);
+    m_clientsToAdd.add(client);
+}
+
+void SVGClipPathElement::removeClient(Node* client)
+{
+    ASSERT(client);
+    m_clientsToAdd.remove(client);
 }
 
 }