Create NetworkQuietDetector.

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

Index: third_party/WebKit/Source/core/loader/FrameFetchContext.cpp
diff --git a/third_party/WebKit/Source/core/loader/FrameFetchContext.cpp b/third_party/WebKit/Source/core/loader/FrameFetchContext.cpp
index 92e76b7a0daddc290f6d349084370051bb31f948..9082c4a9b0f4fbd86b39ca4625730d1f7ead7c20 100644
--- a/third_party/WebKit/Source/core/loader/FrameFetchContext.cpp
+++ b/third_party/WebKit/Source/core/loader/FrameFetchContext.cpp
@@ -54,6 +54,7 @@
 #include "core/loader/FrameLoader.h"
 #include "core/loader/MixedContentChecker.h"
 #include "core/loader/NetworkHintsInterface.h"
+#include "core/loader/NetworkQuietDetector.h"
 #include "core/loader/PingLoader.h"
 #include "core/loader/ProgressTracker.h"
 #include "core/loader/SubresourceFilter.h"
@@ -501,6 +502,7 @@ void FrameFetchContext::DidLoadResource(Resource* resource) {
   if (!GetDocument())
     return;
   FirstMeaningfulPaintDetector::From(*GetDocument()).CheckNetworkStable();
+  NetworkQuietDetector::From(*GetDocument()).CheckNetworkStable();
   if (resource->IsLoadEventBlockingResourceType())
     GetDocument()->CheckCompleted();
 }