Remove invert viewport scroll order setting from Blink

third_party/WebKit/Source/core/frame/RootFrameViewport.h

Index: third_party/WebKit/Source/core/frame/RootFrameViewport.h
diff --git a/third_party/WebKit/Source/core/frame/RootFrameViewport.h b/third_party/WebKit/Source/core/frame/RootFrameViewport.h
index ef6f90ebb3c7b96a5c0cc8023526e1efdb74f650..7407c868f6cb2202a48a35e0d6130e4cad02350a 100644
--- a/third_party/WebKit/Source/core/frame/RootFrameViewport.h
+++ b/third_party/WebKit/Source/core/frame/RootFrameViewport.h
@@ -25,9 +25,9 @@ class CORE_EXPORT RootFrameViewport final : public NoBaseWillBeGarbageCollectedF
     USING_FAST_MALLOC_WILL_BE_REMOVED(RootFrameViewport);
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(RootFrameViewport);
 public:
-    static PassOwnPtrWillBeRawPtr<RootFrameViewport> create(ScrollableArea& visualViewport, ScrollableArea& layoutViewport, bool invertScrollOrder = false)
+    static PassOwnPtrWillBeRawPtr<RootFrameViewport> create(ScrollableArea& visualViewport, ScrollableArea& layoutViewport)
     {
-        return adoptPtrWillBeNoop(new RootFrameViewport(visualViewport, layoutViewport, invertScrollOrder));
+        return adoptPtrWillBeNoop(new RootFrameViewport(visualViewport, layoutViewport));
     }
 
     DECLARE_VIRTUAL_TRACE();
@@ -73,7 +73,7 @@ public:
     Widget* widget() override;
 
 private:
-    RootFrameViewport(ScrollableArea& visualViewport, ScrollableArea& layoutViewport, bool invertScrollOrder);
+    RootFrameViewport(ScrollableArea& visualViewport, ScrollableArea& layoutViewport);
 
     DoublePoint scrollOffsetFromScrollAnimators() const;
 
@@ -89,10 +89,6 @@ private:
 
     RawPtrWillBeMember<ScrollableArea> m_visualViewport;
     RawPtrWillBeMember<ScrollableArea> m_layoutViewport;
-
-    // Experimental flag. If the experiment is enabled, scroll the visual viewport first,
-    // the bubble scrolls to the layout viewport.
-    bool m_invertScrollOrder;
 };
 
 } // namespace blink