LayoutBox::scrollRectToVisible doesn't respect overflow:hidden property.

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef RootFrameViewport_h
 #define RootFrameViewport_h
 
 #include "core/CoreExport.h"
 #include "platform/scroll/ScrollableArea.h"
 
@@ skipping 19 matching lines @@
         return adoptPtrWillBeNoop(new RootFrameViewport(visualViewport, layoutViewport, invertScrollOrder));
     }
 
     DECLARE_VIRTUAL_TRACE();
 
     // ScrollableArea Implementation
     void setScrollPosition(const DoublePoint&, ScrollType, ScrollBehavior = ScrollBehaviorInstant) override;
     LayoutRect scrollIntoView(
         const LayoutRect& rectInContent,
         const ScrollAlignment& alignX,
-        const ScrollAlignment& alignY) override;
+        const ScrollAlignment& alignY,
+        ScrollType  = ProgrammaticScroll) override;
     DoubleRect visibleContentRectDouble(IncludeScrollbarsInRect = ExcludeScrollbars) const override;
     IntRect visibleContentRect(IncludeScrollbarsInRect = ExcludeScrollbars) const override;
     bool shouldUseIntegerScrollOffset() const override;
     bool isActive() const override;
     int scrollSize(ScrollbarOrientation) const override;
     bool isScrollCornerVisible() const override;
     IntRect scrollCornerRect() const override;
     void setScrollOffset(const IntPoint&, ScrollType) override;
     void setScrollOffset(const DoublePoint&, ScrollType) override;
     IntPoint scrollPosition() const override;
@@ skipping 38 matching lines @@
     RawPtrWillBeMember<ScrollableArea> m_layoutViewport;
 
     // Experimental flag. If the experiment is enabled, scroll the visual viewport first,
     // the bubble scrolls to the layout viewport.
     bool m_invertScrollOrder;
 };
 
 } // namespace blink
 
 #endif // RootFrameViewport_h