1 files changed, 5 insertions, 1 deletions
diff --git a/chromium/third_party/blink/renderer/core/scroll/scrollable_area.h b/chromium/third_party/blink/renderer/core/scroll/scrollable_area.h
index 56c34cab314..f0eb978ce51 100644
--- a/chromium/third_party/blink/renderer/core/scroll/scrollable_area.h
+++ b/chromium/third_party/blink/renderer/core/scroll/scrollable_area.h
@@ -478,7 +478,7 @@ class CORE_EXPORT ScrollableArea : public GarbageCollectedMixin {
   // for layout movements (bit.ly/scroll-anchoring).
   virtual bool ShouldPerformScrollAnchoring() const { return false; }
 
-  void Trace(Visitor*) override;
+  void Trace(Visitor*) const override;
 
   virtual void ClearScrollableArea();
 
@@ -551,6 +551,10 @@ class CORE_EXPORT ScrollableArea : public GarbageCollectedMixin {
 
   virtual const Document* GetDocument() const;
 
+  // Resolves into un-zoomed physical pixels a scroll |delta| based on its
+  // ScrollGranularity units.
+  ScrollOffset ResolveScrollDelta(ScrollGranularity, const ScrollOffset& delta);
+
  private:
   FRIEND_TEST_ALL_PREFIXES(ScrollableAreaTest,
                            PopupOverlayScrollbarShouldNotFadeOut);