[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..cabc7bf3557781f9329177038a1aefea8c125e6f 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;
@@ -897,13 +896,6 @@ 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 +950,8 @@ class CORE_EXPORT LocalFrameView final
   void ContentsResized() override;
   void ScrollbarExistenceMaybeChanged();
 
+  LayoutObject* LayoutObjectForScrollbars() const override;
+
   // Methods to do point conversion via layoutObjects, in order to take
   // transforms into account.
   IntRect ConvertToContainingEmbeddedContentView(const IntRect&) const;
@@ -993,11 +987,6 @@ 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;