Ensure RemoteViewportIntersection rect persists across frame navigations

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

Index: third_party/WebKit/Source/core/frame/FrameView.cpp
diff --git a/third_party/WebKit/Source/core/frame/FrameView.cpp b/third_party/WebKit/Source/core/frame/FrameView.cpp
index 83ffd574e664ad10da71bbf07e41ebdb07d780fd..6dcb7e64bb200a8f5d21cb805aaf4d80b8f37928 100644
--- a/third_party/WebKit/Source/core/frame/FrameView.cpp
+++ b/third_party/WebKit/Source/core/frame/FrameView.cpp
@@ -5282,16 +5282,8 @@ String FrameView::MainThreadScrollingReasonsAsText() const {
   return result;
 }
 
-void FrameView::SetViewportIntersectionFromParent(
-    const IntRect& viewport_intersection) {
-  if (remote_viewport_intersection_ != viewport_intersection) {
-    remote_viewport_intersection_ = viewport_intersection;
-    ScheduleAnimation();
-  }
-}
-
 IntRect FrameView::RemoteViewportIntersection() {
-  IntRect intersection(remote_viewport_intersection_);
+  IntRect intersection(GetFrame().RemoteViewportIntersection());
   intersection.Move(ScrollOffsetInt());
   return intersection;
 }