1 files changed, 10 insertions, 0 deletions
diff --git a/src/3rdparty/webkit/WebCore/platform/graphics/GraphicsLayer.cpp b/src/3rdparty/webkit/WebCore/platform/graphics/GraphicsLayer.cpp
index b375bd3..d196a0c 100644
--- a/src/3rdparty/webkit/WebCore/platform/graphics/GraphicsLayer.cpp
+++ b/src/3rdparty/webkit/WebCore/platform/graphics/GraphicsLayer.cpp
@@ -86,6 +86,16 @@ GraphicsLayer::~GraphicsLayer()
     removeFromParent();
 }
 
+bool GraphicsLayer::hasAncestor(GraphicsLayer* ancestor) const
+{
+    for (GraphicsLayer* curr = parent(); curr; curr = curr->parent()) {
+        if (curr == ancestor)
+            return true;
+    }
+    
+    return false;
+}
+
 void GraphicsLayer::addChild(GraphicsLayer* childLayer)
 {
     ASSERT(childLayer != this);