Early out if the scroll position passed in by js is NaN

Source/core/html/HTMLBodyElement.cpp

Index: Source/core/html/HTMLBodyElement.cpp
diff --git a/Source/core/html/HTMLBodyElement.cpp b/Source/core/html/HTMLBodyElement.cpp
index 5702114e9b3a8bd42ddfbcd9c6ecac2499acbfa6..7c2e577627db6efaf69d604b253a3f93a564310e 100644
--- a/Source/core/html/HTMLBodyElement.cpp
+++ b/Source/core/html/HTMLBodyElement.cpp
@@ -247,6 +247,9 @@ void HTMLBodyElement::setScrollLeft(double scrollLeft)
     Document& document = this->document();
     document.updateLayoutIgnorePendingStylesheets();
 
+    if (std::isnan(scrollLeft))
+        return;
+
     if (RuntimeEnabledFeatures::scrollTopLeftInteropEnabled()) {
         RenderBox* render = renderBox();
         if (!render)
@@ -294,6 +297,9 @@ void HTMLBodyElement::setScrollTop(double scrollTop)
     Document& document = this->document();
     document.updateLayoutIgnorePendingStylesheets();
 
+    if (std::isnan(scrollTop))
+        return;
+
     if (RuntimeEnabledFeatures::scrollTopLeftInteropEnabled()) {
         RenderBox* render = renderBox();
         if (!render)