Only scroll on main if the targeted frames need to scroll on main

third_party/WebKit/Source/core/page/scrolling/ScrollingCoordinator.h

Index: third_party/WebKit/Source/core/page/scrolling/ScrollingCoordinator.h
diff --git a/third_party/WebKit/Source/core/page/scrolling/ScrollingCoordinator.h b/third_party/WebKit/Source/core/page/scrolling/ScrollingCoordinator.h
index b5775ab80f437659a1792d800a4e512b198bac16..f6747424561a7a1473052200bd41419ae0aa2cd3 100644
--- a/third_party/WebKit/Source/core/page/scrolling/ScrollingCoordinator.h
+++ b/third_party/WebKit/Source/core/page/scrolling/ScrollingCoordinator.h
@@ -94,11 +94,6 @@ class CORE_EXPORT ScrollingCoordinator final
   // Should be called whenever the root layer for the given frame view changes.
   void frameViewRootLayerDidChange(FrameView*);
 
-  MainThreadScrollingReasons mainThreadScrollingReasons() const;
-  bool shouldUpdateScrollLayerPositionOnMainThread() const {
-    return mainThreadScrollingReasons() != 0;
-  }
-
   std::unique_ptr<WebScrollbarLayer> createSolidColorScrollbarLayer(
       ScrollbarOrientation,
       int thumbThickness,
@@ -119,8 +114,6 @@ class CORE_EXPORT ScrollingCoordinator final
                                           const PaintLayer* parent);
   void updateClipParentForGraphicsLayer(GraphicsLayer* child,
                                         const PaintLayer* parent);
-
-  String mainThreadScrollingReasonsAsText() const;
   Region computeShouldHandleScrollGestureOnMainThreadRegion(
       const LocalFrame*,
       const IntPoint& frameLocation) const;
@@ -158,8 +151,6 @@ class CORE_EXPORT ScrollingCoordinator final
   void setShouldUpdateScrollLayerPositionOnMainThread(
       MainThreadScrollingReasons);
 
-  bool hasVisibleSlowRepaintViewportConstrainedObjects(FrameView*) const;
-
   void setShouldHandleScrollGestureOnMainThreadRegion(const Region&);
   void setTouchEventTargetRects(LayerHitTestRects&);
   void computeTouchEventTargetRects(LayerHitTestRects&);