Remove a failing ASSERT(paintInvalidationContainer)

Source/core/rendering/RenderView.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple 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
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 483 matching lines @@
         // If we have a pending scroll, invalidate the previous scroll position.
         if (!m_frameView->pendingScrollDelta().isZero()) {
             rect.move(-m_frameView->pendingScrollDelta());
         }
     }
 
     // Apply our transform if we have one (because of full page zooming).
     if (!paintInvalidationContainer && layer() && layer()->transform())
         rect = layer()->transform()->mapRect(rect);
 
-    ASSERT(paintInvalidationContainer);
     if (paintInvalidationContainer == this)
         return;
 
     Element* owner = document().ownerElement();
     if (!owner)
         return;
 
     if (RenderBox* obj = owner->renderBox()) {
         // Intersect the viewport with the paint invalidation rect.
         LayoutRect viewRectangle = viewRect();
@@ skipping 476 matching lines @@
     return viewWidth(IncludeScrollbars) / scale;
 }
 
 double RenderView::layoutViewportHeight() const
 {
     float scale = m_frameView ? m_frameView->frame().pageZoomFactor() : 1;
     return viewHeight(IncludeScrollbars) / scale;
 }
 
 } // namespace blink