DevTools: expose setLayerTreeId() so we can relate events from LayerTreeHost

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 196c876e43114652c0cafce1b11f9d3629f65329..d5def10b3494cf14e8e9805d87a71f6039490ef7 100644
--- a/Source/core/inspector/InspectorController.cpp
+++ b/Source/core/inspector/InspectorController.cpp
@@ -107,10 +107,12 @@ InspectorController::InspectorController(Page* page, InspectorClient* inspectorC
     m_memoryAgent = memoryAgentPtr.get();
     m_agents.append(memoryAgentPtr.release());
 
-    m_agents.append(InspectorTimelineAgent::create(m_instrumentingAgents.get(), pageAgent, m_memoryAgent, domAgent, m_state.get(), InspectorTimelineAgent::PageInspector,
-       inspectorClient));
-    m_agents.append(InspectorApplicationCacheAgent::create(m_instrumentingAgents.get(), m_state.get(), pageAgent));
+    OwnPtr<InspectorTimelineAgent> timelineAgentPtr(InspectorTimelineAgent::create(m_instrumentingAgents.get(), pageAgent, m_memoryAgent, domAgent, m_state.get(),
+        InspectorTimelineAgent::PageInspector, inspectorClient));
+    m_timelineAgent = timelineAgentPtr.get();
+    m_agents.append(timelineAgentPtr.release());
 
+    m_agents.append(InspectorApplicationCacheAgent::create(m_instrumentingAgents.get(), m_state.get(), pageAgent));
     m_agents.append(InspectorResourceAgent::create(m_instrumentingAgents.get(), pageAgent, inspectorClient, m_state.get(), m_overlay.get()));
 
     PageScriptDebugServer* pageScriptDebugServer = &PageScriptDebugServer::shared();
@@ -242,6 +244,11 @@ void InspectorController::setProcessId(long processId)
     IdentifiersFactory::setProcessId(processId);
 }
 
+void InspectorController::setLayerTreeId(int id)
+{
+    m_timelineAgent->setLayerTreeId(id);
+}
+
 void InspectorController::webViewResized(const IntSize& size)
 {
     if (InspectorPageAgent* pageAgent = m_instrumentingAgents->inspectorPageAgent())