Ensure RemoteViewportIntersection rect persists across frame navigations

third_party/WebKit/Source/core/frame/LocalFrameView.cpp

Index: third_party/WebKit/Source/core/frame/LocalFrameView.cpp
diff --git a/third_party/WebKit/Source/core/frame/LocalFrameView.cpp b/third_party/WebKit/Source/core/frame/LocalFrameView.cpp
index eb769944bd98255ff66d56033fe655caa5df2d80..b47d195420478685d8d524d77728869f075e9cad 100644
--- a/third_party/WebKit/Source/core/frame/LocalFrameView.cpp
+++ b/third_party/WebKit/Source/core/frame/LocalFrameView.cpp
@@ -5319,16 +5319,8 @@ String LocalFrameView::MainThreadScrollingReasonsAsText() const {
   return result;
 }
 
-void LocalFrameView::SetViewportIntersectionFromParent(
-    const IntRect& viewport_intersection) {
-  if (remote_viewport_intersection_ != viewport_intersection) {
-    remote_viewport_intersection_ = viewport_intersection;
-    ScheduleAnimation();
-  }
-}
-
 IntRect LocalFrameView::RemoteViewportIntersection() {
-  IntRect intersection(remote_viewport_intersection_);
+  IntRect intersection(GetFrame().RemoteViewportIntersection());
   intersection.Move(ScrollOffsetInt());
   return intersection;
 }