[instrumentation] Introduce InspectorTraceEvents agent

third_party/WebKit/Source/core/loader/DocumentThreadableLoader.cpp

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013, Intel Corporation
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 754 matching lines @@
       getSecurityOrigin()->toString(), m_actualRequest.url(),
       std::move(preflightResult));
 }
 
 void DocumentThreadableLoader::reportResponseReceived(
     unsigned long identifier,
     const ResourceResponse& response) {
   LocalFrame* frame = document() ? document()->frame() : nullptr;
   if (!frame)
     return;
-  TRACE_EVENT1(
-      "devtools.timeline", "ResourceReceiveResponse", "data",
-      InspectorReceiveResponseEvent::data(identifier, frame, response));
   DocumentLoader* loader = frame->loader().documentLoader();
   probe::didReceiveResourceResponse(frame, identifier, loader, response,
                                     resource());
   frame->console().reportResourceResponseReceived(loader, identifier, response);
 }
 
 void DocumentThreadableLoader::handleResponse(
     unsigned long identifier,
     const ResourceResponse& response,
     std::unique_ptr<WebDataConsumerHandle> handle) {
@@ skipping 360 matching lines @@
 }
 
 DEFINE_TRACE(DocumentThreadableLoader) {
   visitor->trace(m_resource);
   visitor->trace(m_loadingContext);
   ThreadableLoader::trace(visitor);
   RawResourceClient::trace(visitor);
 }
 
 }  // namespace blink