Include debug name in GraphicsLayerDebugInfo.

Source/platform/graphics/GraphicsLayer.cpp

Index: Source/platform/graphics/GraphicsLayer.cpp
diff --git a/Source/platform/graphics/GraphicsLayer.cpp b/Source/platform/graphics/GraphicsLayer.cpp
index 47cabf536ddae168b8e6ffda7416ae4a6547e953..120f125d8259651be8cea3cf1c4dcc978da38248 100644
--- a/Source/platform/graphics/GraphicsLayer.cpp
+++ b/Source/platform/graphics/GraphicsLayer.cpp
@@ -512,6 +512,13 @@ blink::WebGraphicsLayerDebugInfo* GraphicsLayer::takeDebugInfo()
     return m_debugInfo.clone();
 }
 
+blink::WebGraphicsLayerDebugInfo* GraphicsLayer::takeDebugInfoFor(WebLayer* layer)
+{
+    GraphicsLayerDebugInfo* clone = m_debugInfo.clone();
+    clone->setDebugName(debugName(layer));
+    return clone;
+}
+
 WebLayer* GraphicsLayer::contentsLayerIfRegistered()
 {
     clearContentsLayerIfUnregistered();