[instrumentation] Introduce InspectorTraceEvents agent

third_party/WebKit/Source/web/WebDevToolsAgentImpl.h

Index: third_party/WebKit/Source/web/WebDevToolsAgentImpl.h
diff --git a/third_party/WebKit/Source/web/WebDevToolsAgentImpl.h b/third_party/WebKit/Source/web/WebDevToolsAgentImpl.h
index d4a15f354eaeceaaa14c78d89875673bfc147de4..e742f546726c80cef109bf1dbf9e7c17fccbbb88 100644
--- a/third_party/WebKit/Source/web/WebDevToolsAgentImpl.h
+++ b/third_party/WebKit/Source/web/WebDevToolsAgentImpl.h
@@ -31,6 +31,8 @@
 #ifndef WebDevToolsAgentImpl_h
 #define WebDevToolsAgentImpl_h
 
+#include <memory>
+
 #include "core/inspector/InspectorPageAgent.h"
 #include "core/inspector/InspectorSession.h"
 #include "core/inspector/InspectorTracingAgent.h"
@@ -41,7 +43,6 @@
 #include "web/InspectorEmulationAgent.h"
 #include "wtf/Forward.h"
 #include "wtf/Vector.h"
-#include <memory>
 
 namespace blink {
 
@@ -50,6 +51,7 @@ class InspectedFrames;
 class InspectorOverlay;
 class InspectorResourceContainer;
 class InspectorResourceContentLoader;
+class InspectorTraceEvents;
 class LocalFrame;
 class WebDevToolsAgentClient;
 class WebLayerTreeView;
@@ -157,6 +159,7 @@ class WebDevToolsAgentImpl final
   Member<InspectorNetworkAgent> m_networkAgent;
   Member<InspectorLayerTreeAgent> m_layerTreeAgent;
   Member<InspectorTracingAgent> m_tracingAgent;
+  Member<InspectorTraceEvents> m_traceEventsAgent;
 
   Member<InspectorSession> m_session;
   bool m_includeViewAgents;