Propogate loading behavior data from Blink to content/

third_party/WebKit/Source/core/html/parser/HTMLDocumentParser.cpp

Index: third_party/WebKit/Source/core/html/parser/HTMLDocumentParser.cpp
diff --git a/third_party/WebKit/Source/core/html/parser/HTMLDocumentParser.cpp b/third_party/WebKit/Source/core/html/parser/HTMLDocumentParser.cpp
index 9845ac6df7937bfa4a11c7364e13f545130ec30b..792fbf7e9dd8fe6ff1fb2bcb1ea3f6a51a4c9b9a 100644
--- a/third_party/WebKit/Source/core/html/parser/HTMLDocumentParser.cpp
+++ b/third_party/WebKit/Source/core/html/parser/HTMLDocumentParser.cpp
@@ -53,6 +53,7 @@
 #include "platform/heap/Handle.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebFrameScheduler.h"
+#include "public/platform/WebLoadingData.h"
 #include "public/platform/WebScheduler.h"
 #include "public/platform/WebThread.h"
 #include "wtf/RefCounted.h"
@@ -1162,6 +1163,9 @@ void HTMLDocumentParser::evaluateAndPreloadScriptForDocumentWrite(const String&
 {
     if (!m_evaluator->shouldEvaluate(source))
         return;
+    document()->loader()->didObserveLoadingBehavior(WebLoadingData::DocumentWriteEvaluatorExperiment);
+    if (!RuntimeEnabledFeatures::documentWriteEvaluatorEnabled())
+        return;
     TRACE_EVENT0("blink", "HTMLDocumentParser::evaluateAndPreloadScriptForDocumentWrite");
 
     double initializeStartTime = monotonicallyIncreasingTimeMS();