| Index: Source/core/inspector/InspectorLayerTreeAgent.cpp | 
| diff --git a/Source/core/inspector/InspectorLayerTreeAgent.cpp b/Source/core/inspector/InspectorLayerTreeAgent.cpp | 
| index 43f7cf90a5fc1695b903d71aa7e6d938243db5a1..503545c8f273b706a423f737d1fbf1e73f5aa67e 100644 | 
| --- a/Source/core/inspector/InspectorLayerTreeAgent.cpp | 
| +++ b/Source/core/inspector/InspectorLayerTreeAgent.cpp | 
| @@ -148,6 +148,12 @@ InspectorLayerTreeAgent::~InspectorLayerTreeAgent() | 
| { | 
| } | 
|  | 
| +void InspectorLayerTreeAgent::trace(Visitor* visitor) | 
| +{ | 
| +    visitor->trace(m_page); | 
| +    InspectorBaseAgent::trace(visitor); | 
| +} | 
| + | 
| void InspectorLayerTreeAgent::setFrontend(InspectorFrontend* frontend) | 
| { | 
| m_frontend = frontend->layertree(); | 
|  |