Better scrolling fix

third_party/WebKit/Source/core/layout/LayoutBlock.cpp

Index: third_party/WebKit/Source/core/layout/LayoutBlock.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutBlock.cpp b/third_party/WebKit/Source/core/layout/LayoutBlock.cpp
index 24154469a213ee910a2faf91521f742e44581f37..47dfd272e591ebd0d74d19fdfdcfc24c8ddc8fc0 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBlock.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutBlock.cpp
@@ -816,7 +816,7 @@ void LayoutBlock::startDelayUpdateScrollInfo()
     ++gDelayUpdateScrollInfo;
 }
 
-bool LayoutBlock::finishDelayUpdateScrollInfo(SubtreeLayoutScope* layoutScope, ScrollPositionMap* scrollMap)
+bool LayoutBlock::finishDelayUpdateScrollInfo(SubtreeLayoutScope* layoutScope)
 {
     bool childrenMarkedForRelayout = false;
 
@@ -830,10 +830,7 @@ bool LayoutBlock::finishDelayUpdateScrollInfo(SubtreeLayoutScope* layoutScope, S
 
         for (auto* block : *infoSet) {
             if (block->hasOverflowClip()) {
-                PaintLayerScrollableArea* scrollableArea = block->layer()->getScrollableArea();
-                if (scrollMap)
-                    scrollMap->add(scrollableArea, scrollableArea->scrollPositionDouble());
-                childrenMarkedForRelayout |= scrollableArea->updateAfterLayout(layoutScope);
+                childrenMarkedForRelayout |= block->layer()->getScrollableArea()->updateAfterLayout(layoutScope);
             }
         }
     }