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

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

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 199 matching lines @@
     // The following six functions are used when the layout tree hierarchy changes to make sure layers get
     // properly added and removed.  Since containership can be implemented by any subclass, and since a hierarchy
     // can contain a mixture of boxes and other object types, these functions need to be in the base class.
     DeprecatedPaintLayer* enclosingLayer() const;
     void addLayers(DeprecatedPaintLayer* parentLayer);
     void removeLayers(DeprecatedPaintLayer* parentLayer);
     void moveLayers(DeprecatedPaintLayer* oldParent, DeprecatedPaintLayer* newParent);
     DeprecatedPaintLayer* findNextLayer(DeprecatedPaintLayer* parentLayer, LayoutObject* startPoint, bool checkParent = true);
 
     // Scrolling is a LayoutBox concept, however some code just cares about recursively scrolling our enclosing ScrollableArea(s).
-    bool scrollRectToVisible(const LayoutRect&, const ScrollAlignment& alignX = ScrollAlignment::alignCenterIfNeeded, const ScrollAlignment& alignY = ScrollAlignment::alignCenterIfNeeded);
+    bool scrollRectToVisible(const LayoutRect&, const ScrollAlignment& alignX = ScrollAlignment::alignCenterIfNeeded, const ScrollAlignment& alignY = ScrollAlignment::alignCenterIfNeeded, ScrollType = ProgrammaticScroll);
 
     // Convenience function for getting to the nearest enclosing box of a LayoutObject.
     LayoutBox* enclosingBox() const;
     LayoutBoxModelObject* enclosingBoxModelObject() const;
 
     LayoutBox* enclosingScrollableBox() const;
 
     // Function to return our enclosing flow thread if we are contained inside one. This
     // function follows the containing block chain.
     LayoutFlowThread* flowThreadContainingBlock() const
@@ skipping 1671 matching lines @@
 void showTree(const blink::LayoutObject*);
 void showLineTree(const blink::LayoutObject*);
 void showLayoutTree(const blink::LayoutObject* object1);
 // We don't make object2 an optional parameter so that showLayoutTree
 // can be called from gdb easily.
 void showLayoutTree(const blink::LayoutObject* object1, const blink::LayoutObject* object2);
 
 #endif
 
 #endif // LayoutObject_h