Record DevTools metadata events on worker threads when starting recoring tracing based Timeline

Source/core/inspector/InspectorController.cpp

Index: Source/core/inspector/InspectorController.cpp
diff --git a/Source/core/inspector/InspectorController.cpp b/Source/core/inspector/InspectorController.cpp
index d41082ada05b6e9099965a6ba8939f73f929def3..0b95f79f3914d6f476dc2e2d29f8a4081bee8ac3 100644
--- a/Source/core/inspector/InspectorController.cpp
+++ b/Source/core/inspector/InspectorController.cpp
@@ -103,10 +103,14 @@ InspectorController::InspectorController(Page* page, InspectorClient* inspectorC
     m_layerTreeAgent = layerTreeAgentPtr.get();
     m_agents.append(layerTreeAgentPtr.release());
 
-    OwnPtrWillBeRawPtr<InspectorTracingAgent> tracingAgentPtr = InspectorTracingAgent::create(inspectorClient);
+    OwnPtrWillBeRawPtr<InspectorWorkerAgent> workerAgentPtr = InspectorWorkerAgent::create();
+
+    OwnPtrWillBeRawPtr<InspectorTracingAgent> tracingAgentPtr = InspectorTracingAgent::create(inspectorClient, workerAgentPtr.get());
     m_tracingAgent = tracingAgentPtr.get();
     m_agents.append(tracingAgentPtr.release());
 
+    m_agents.append(workerAgentPtr.release());
+
     OwnPtrWillBeRawPtr<InspectorTimelineAgent> timelineAgentPtr(InspectorTimelineAgent::create(m_pageAgent, m_layerTreeAgent,
         overlay, InspectorTimelineAgent::PageInspector, inspectorClient));
     m_timelineAgent = timelineAgentPtr.get();
@@ -118,8 +122,6 @@ InspectorController::InspectorController(Page* page, InspectorClient* inspectorC
 
     m_agents.append(PageConsoleAgent::create(injectedScriptManager, m_domAgent, m_timelineAgent, m_tracingAgent));
 
-    m_agents.append(InspectorWorkerAgent::create());
-
     ASSERT_ARG(inspectorClient, inspectorClient);
     m_injectedScriptManager->injectedScriptHost()->init(m_instrumentingAgents.get(), pageScriptDebugServer);
 }