onActivateLayerTree  384 Source/core/inspector/InspectorTimelineAgent.cpp         dispatcher->addListener(InstrumentationEvents::ActivateLayerTree, TRACE_EVENT_PHASE_INSTANT, this, &InspectorTimelineAgent::onActivateLayerTree, m_client);
onActivateLayerTree  254 Source/core/inspector/InspectorTimelineAgent.h     void onActivateLayerTree(const TraceEventDispatcher::TraceEvent&);