[Refactor] Moved scrollbar creation and deletion to ScrollbarManager

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

Index: third_party/WebKit/Source/core/frame/LocalFrameView.h
diff --git a/third_party/WebKit/Source/core/frame/LocalFrameView.h b/third_party/WebKit/Source/core/frame/LocalFrameView.h
index 494ecb2d67ab659f74fffd49f702599216d0e489..f7fe78e70102a381e0432a9f5617bccac516b999 100644
--- a/third_party/WebKit/Source/core/frame/LocalFrameView.h
+++ b/third_party/WebKit/Source/core/frame/LocalFrameView.h
@@ -68,7 +68,6 @@ namespace blink {
 class AXObjectCache;
 class Cursor;
 class DocumentLifecycle;
-class Element;
 class ElementVisibilityObserver;
 class Frame;
 class FloatSize;
@@ -420,9 +419,6 @@ class CORE_EXPORT LocalFrameView final
 
   bool IsActive() const override;
 
-  // Override scrollbar notifications to update the AXObject cache.
-  void DidAddScrollbar(Scrollbar&, ScrollbarOrientation) override;
-
   // FIXME: This should probably be renamed as the 'inSubtreeLayout' parameter
   // passed around the LocalFrameView layout methods can be true while this
   // returns false.
@@ -897,13 +893,6 @@ class CORE_EXPORT LocalFrameView final
 
     void SetHasHorizontalScrollbar(bool has_scrollbar) override;
     void SetHasVerticalScrollbar(bool has_scrollbar) override;
-
-    // TODO(ymalik): This should be hidden and all calls should go through
-    // setHas*Scrollbar functions above.
-    Scrollbar* CreateScrollbar(ScrollbarOrientation) override;
-
-   protected:
-    void DestroyScrollbar(ScrollbarOrientation) override;
   };
 
   LocalFrameView* ParentFrameView() const;
@@ -958,6 +947,8 @@ class CORE_EXPORT LocalFrameView final
   void ContentsResized() override;
   void ScrollbarExistenceMaybeChanged();
 
+  LayoutObject* LayoutObjectForScrollbarStyle() const override;
+
   // Methods to do point conversion via layoutObjects, in order to take
   // transforms into account.
   IntRect ConvertToContainingEmbeddedContentView(const IntRect&) const;
@@ -993,11 +984,6 @@ class CORE_EXPORT LocalFrameView final
   // when visible.
   bool HasOverlayScrollbars() const;
 
-  // Returns true if the frame should use custom scrollbars. If true, sets
-  // customScrollbarElement to the element that supplies the scrollbar's style
-  // information.
-  bool ShouldUseCustomScrollbars(Element*& custom_scrollbar_element) const;
-
   // Returns true if a scrollbar needs to go from native -> custom or vice
   // versa, or if a custom scrollbar has a stale owner.
   bool NeedsScrollbarReconstruction() const;