Do not promote position sticky or fixed elements unless they move with scroll.

third_party/WebKit/Source/core/layout/LayoutBoxModelObject.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2010 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 190 matching lines @@
   ImageQualityController::remove(*this);
 
   // A continuation of this LayoutObject should be destroyed at subclasses.
   ASSERT(!continuation());
 
   if (isPositioned()) {
     // Don't use this->view() because the document's layoutView has been set to
     // 0 during destruction.
     if (LocalFrame* frame = this->frame()) {
       if (FrameView* frameView = frame->view()) {
-        if (style()->hasViewportConstrainedPosition())
+        if (style()->hasViewportConstrainedPosition() ||
+            style()->hasStickyConstrainedPosition())
           frameView->removeViewportConstrainedObject(*this);
       }
     }
   }
 
   LayoutObject::willBeDestroyed();
 
   destroyLayer();
 }
 
@@ skipping 1188 matching lines @@
   if (rootElementStyle->hasBackground())
     return false;
 
   if (node() != document().firstBodyElement())
     return false;
 
   return true;
 }
 
 }  // namespace blink