Better scrolling fix

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

Index: third_party/WebKit/Source/core/layout/LayoutBlock.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutBlock.h b/third_party/WebKit/Source/core/layout/LayoutBlock.h
index ae8ca76451fc89bc5ec639a9b7e540aefd2738f8..c7ffc47aaf929b0b64fcd8656e04b9aa2a7e4d50 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBlock.h
+++ b/third_party/WebKit/Source/core/layout/LayoutBlock.h
@@ -341,17 +341,8 @@ protected:
     // finishDelayUpdateScrollInfo() will do nothing until finishDelayUpdateScrollInfo()
     // is called the same number of times.
     // finishDelayUpdateScrollInfo returns true when it marked something for layout.
-    // It will also return a map of saved scroll positions that the caller should restore
-    // on the given scrollable areas after performing the layout.
-    // This can be necessary because Flexbox's multi-pass layout can lose the scroll position.
-    // TODO(cbiesinger): This is a temporary hack. The right solution is to delay the scroll
-    // clamping that currently happens in PaintLayerScrollableArea::updateAfterLayout to only
-    // happen after all layout is done, i.e. during updateLayerPositionsAfterLayout. However,
-    // that currently fails a layout test. To fix this bug in time for M50, we use this temporary
-    // hack. The real fix is tracked in crbug.com/600036
-    typedef PersistentHeapHashMap<Member<PaintLayerScrollableArea>, DoublePoint> ScrollPositionMap;
     static void startDelayUpdateScrollInfo();
-    static bool finishDelayUpdateScrollInfo(SubtreeLayoutScope*, ScrollPositionMap*);
+    static bool finishDelayUpdateScrollInfo(SubtreeLayoutScope*);
 
     void updateScrollInfoAfterLayout();