Enable ServerTiming support

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

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 47 matching lines @@
 #include "core/loader/ProgressTracker.h"
 #include "core/loader/SubresourceFilter.h"
 #include "core/loader/appcache/ApplicationCacheHost.h"
 #include "core/loader/private/FrameClientHintsPreferencesContext.h"
 #include "core/page/Page.h"
 #include "core/paint/FirstMeaningfulPaintDetector.h"
 #include "core/probe/CoreProbes.h"
 #include "core/svg/graphics/SVGImageChromeClient.h"
 #include "core/timing/DOMWindowPerformance.h"
 #include "core/timing/Performance.h"
+#include "core/timing/PerformanceBase.h"
 #include "platform/WebFrameScheduler.h"
 #include "platform/exported/WrappedResourceRequest.h"
 #include "platform/instrumentation/tracing/TracedValue.h"
 #include "platform/loader/fetch/ClientHintsPreferences.h"
 #include "platform/loader/fetch/FetchInitiatorTypeNames.h"
 #include "platform/loader/fetch/Resource.h"
 #include "platform/loader/fetch/ResourceLoadPriority.h"
 #include "platform/loader/fetch/ResourceLoadingLog.h"
 #include "platform/loader/fetch/ResourceTimingInfo.h"
 #include "platform/loader/fetch/UniqueIdentifier.h"
@@ skipping 451 matching lines @@
   }
 
   frame()->loader().progress().incrementProgress(identifier, response);
   localFrameClient()->dispatchDidReceiveResponse(response);
   DocumentLoader* documentLoader = masterDocumentLoader();
   probe::didReceiveResourceResponse(frame(), identifier, documentLoader,
                                     response, resource);
   // It is essential that inspector gets resource response BEFORE console.
   frame()->console().reportResourceResponseReceived(documentLoader, identifier,
                                                     response);
+
+  if (RuntimeEnabledFeatures::serverTimingEnabled() &&
+      resource->getType() != Resource::MainResource &&  // MainResource
+                                                        // responses were
+                                                        // already added, skip
+                                                        // them here

[Yoav Weiss, 2017/04/06 20:19:55]

Nit: Maybe move the comment above the condition? Formatting here is weird. Also,
add a period at the end.

+      frame()->document() && frame()->document()->domWindow()) {
+    LocalDOMWindow* localDOMWindow = frame()->document()->domWindow();
+    DOMWindowPerformance::performance(*localDOMWindow)
+        ->addServerTiming(response,
+                          localDOMWindow->hasLoadEventFired()
+                              ? PerformanceBase::ShouldAddToBuffer::Never
+                              : PerformanceBase::ShouldAddToBuffer::Always);
+  }
 }
 
 void FrameFetchContext::dispatchDidReceiveData(unsigned long identifier,
                                                const char* data,
                                                int dataLength) {
   frame()->loader().progress().incrementProgress(identifier, dataLength);
   probe::didReceiveData(frame(), identifier, data, dataLength);
 }
 
 void FrameFetchContext::dispatchDidReceiveEncodedData(unsigned long identifier,
@@ skipping 515 matching lines @@
   return frame()->frameScheduler()->loadingTaskRunner();
 }
 
 DEFINE_TRACE(FrameFetchContext) {
   visitor->trace(m_document);
   visitor->trace(m_documentLoader);
   FetchContext::trace(visitor);
 }
 
 }  // namespace blink