Fix scroll-restoration-push-replace.html test to support scrollTopLeftInterop mode

LayoutTests/fast/history/scroll-restoration/scroll-restoration-push-replace.html

Index: LayoutTests/fast/history/scroll-restoration/scroll-restoration-push-replace.html
diff --git a/LayoutTests/fast/history/scroll-restoration/scroll-restoration-push-replace.html b/LayoutTests/fast/history/scroll-restoration/scroll-restoration-push-replace.html
index 3db338f7ca74140e3e322af9c91f3ad537f367cf..4505ac079bb71e906e62fd768c2d09728796f702 100644
--- a/LayoutTests/fast/history/scroll-restoration/scroll-restoration-push-replace.html
+++ b/LayoutTests/fast/history/scroll-restoration/scroll-restoration-push-replace.html
@@ -58,8 +58,8 @@
       }
       console.log(`verifying ${key}`);
       assert_equals(history.state.key, key, `state should have key: ${key}`);
-      assert_equals(document.body.scrollLeft, entry.expectedScroll[0], `scrollLeft is correct for ${key}`);
-      assert_equals(document.body.scrollTop, entry.expectedScroll[1], `scrollTop is correct ${key}`);
+      assert_equals(document.scrollingElement.scrollLeft, entry.expectedScroll[0], `scrollLeft is correct for ${key}`);
+      assert_equals(document.scrollingElement.scrollTop, entry.expectedScroll[1], `scrollTop is correct ${key}`);
 
       window.history.back();
     }));
@@ -72,4 +72,4 @@
     }, 0);
 
   }, 'history.{push,replace}State retain and respect history.scrollRestoration');
-</script>
+</script>