[instrumentation] Generalize instrumentation to be used beyond the core layer

third_party/WebKit/Source/platform/loader/fetch/ResourceFetcher.cpp

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller (mueller@kde.org)
     Copyright (C) 2002 Waldo Bastian (bastian@kde.org)
     Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All
     rights reserved.
     Copyright (C) 2009 Torch Mobile Inc. http://www.torchmobile.com/
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
@@ skipping 11 matching lines @@
     Boston, MA 02110-1301, USA.
 
     This class provides all functionality needed for loading images, style
     sheets and html pages from the web. It has a memory cache for these objects.
 */
 
 #include "platform/loader/fetch/ResourceFetcher.h"
 
 #include "platform/Histogram.h"
 #include "platform/RuntimeEnabledFeatures.h"
+#include "platform/instrumentation/PlatformInstrumentation.h"
 #include "platform/instrumentation/tracing/TraceEvent.h"
 #include "platform/instrumentation/tracing/TracedValue.h"
 #include "platform/loader/fetch/FetchContext.h"
 #include "platform/loader/fetch/FetchInitiatorTypeNames.h"
 #include "platform/loader/fetch/MemoryCache.h"
 #include "platform/loader/fetch/ResourceLoader.h"
 #include "platform/loader/fetch/ResourceLoadingLog.h"
 #include "platform/loader/fetch/ResourceTimingInfo.h"
 #include "platform/loader/fetch/UniqueIdentifier.h"
 #include "platform/mhtml/ArchiveResource.h"
@@ skipping 1198 matching lines @@
 
 bool ResourceFetcher::startLoad(Resource* resource) {
   DCHECK(resource);
   DCHECK(resource->stillNeedsLoad());
   if (!context().shouldLoadNewResource(resource->getType())) {
     memoryCache()->remove(resource);
     return false;
   }
 
   ResourceRequest request(resource->resourceRequest());
-  context().dispatchWillSendRequest(resource->identifier(), request,
-                                    ResourceResponse(),
+  ResourceResponse response;
+
+  blink::probe::PlatformSendRequest probe(&context(), resource->identifier(),
+                                          request, response,
+                                          resource->options().initiatorInfo);
+
+  context().dispatchWillSendRequest(resource->identifier(), request, response,
                                     resource->options().initiatorInfo);
 
   // TODO(shaochuan): Saving modified ResourceRequest back to |resource|, remove
   // once dispatchWillSendRequest() takes const ResourceRequest.
   // crbug.com/632580
   resource->setResourceRequest(request);
 
   // Resource requests from suborigins should not be intercepted by the service
   // worker of the physical origin. This has the effect that, for now,
   // suborigins do not work with service workers. See
@@ skipping 291 matching lines @@
   visitor->trace(m_context);
   visitor->trace(m_archive);
   visitor->trace(m_loaders);
   visitor->trace(m_nonBlockingLoaders);
   visitor->trace(m_documentResources);
   visitor->trace(m_preloads);
   visitor->trace(m_resourceTimingInfoMap);
 }
 
 }  // namespace blink