Enable ServerTiming support

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

Index: third_party/WebKit/Source/core/loader/DocumentLoader.cpp
diff --git a/third_party/WebKit/Source/core/loader/DocumentLoader.cpp b/third_party/WebKit/Source/core/loader/DocumentLoader.cpp
index 6bfe79f90773bee17c7d9503d1101ce47d07e072..b6c4603d7a9217635e621223e73207b4338fcc57 100644
--- a/third_party/WebKit/Source/core/loader/DocumentLoader.cpp
+++ b/third_party/WebKit/Source/core/loader/DocumentLoader.cpp
@@ -61,6 +61,8 @@
 #include "core/page/FrameTree.h"
 #include "core/page/Page.h"
 #include "core/probe/CoreProbes.h"
+#include "core/timing/DOMWindowPerformance.h"
+#include "core/timing/Performance.h"
 #include "platform/HTTPNames.h"
 #include "platform/UserGestureIndicator.h"
 #include "platform/feature_policy/FeaturePolicy.h"
@@ -140,8 +142,8 @@ LocalFrameClient& DocumentLoader::GetLocalFrameClient() const {
   DCHECK(frame_);
   LocalFrameClient* client = frame_->Client();
   // LocalFrame clears its |m_client| only after detaching all DocumentLoaders
-  // (i.e. calls detachFromFrame() which clears |m_frame|) owned by the
-  // LocalFrame's FrameLoader. So, if |m_frame| is non nullptr, |client| is
+  // (i.e. calls detachFromFrame() which clears |frame_|) owned by the
+  // LocalFrame's FrameLoader. So, if |frame_| is non nullptr, |client| is
   // also non nullptr.
   DCHECK(client);
   return *client;
@@ -959,6 +961,13 @@ void DocumentLoader::DidInstallNewDocument(Document* document) {
     document->ParseAndSetReferrerPolicy(referrer_policy_header);
   }
 
+  if (RuntimeEnabledFeatures::serverTimingEnabled() &&
+      frame_->GetDocument()->domWindow()) {
+    DOMWindowPerformance::performance(*(frame_->GetDocument()->domWindow()))
+        ->AddServerTiming(response_,
+                          PerformanceBase::ShouldAddToBuffer::Always);
+  }
+
   GetLocalFrameClient().DidCreateNewDocument();
 }
 
@@ -1072,7 +1081,7 @@ void DocumentLoader::InstallNewDocument(
     // that the name would be nulled and if the name is accessed after we will
     // fire a UseCounter. If we decide to move forward with this change, we'd
     // actually clean the name here.
-    // m_frame->tree().setName(nullAtom);
+    // frame_->tree().setName(nullAtom);
     frame_->Tree().ExperimentalSetNulledName();
   }