Make LayoutSVGViewportContainer's viewport updates an internal detail

third_party/WebKit/Source/core/layout/svg/LayoutSVGContainer.cpp

 /*
  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2007, 2008 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Google, Inc.  All rights reserved.
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  *
  * 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
@@ skipping 34 matching lines @@
 void LayoutSVGContainer::layout() {
   ASSERT(needsLayout());
   LayoutAnalyzer::Scope analyzer(*this);
 
   // Update the local transform in subclasses.
   SVGTransformChange transformChange = calculateLocalTransform();
   m_didScreenScaleFactorChange =
       transformChange == SVGTransformChange::Full ||
       SVGLayoutSupport::screenScaleFactorChanged(parent());
 
-  // LayoutSVGViewportContainer needs to set the 'layout size changed' flag.
-  determineIfLayoutSizeChanged();
-
   // When hasRelativeLengths() is false, no descendants have relative lengths
   // (hence no one is interested in viewport size changes).
   bool layoutSizeChanged =
       element()->hasRelativeLengths() &&
       SVGLayoutSupport::layoutSizeOfNearestViewportChanged(this);
 
   SVGLayoutSupport::layoutChildren(
       firstChild(), false, m_didScreenScaleFactorChange, layoutSizeChanged);
 
   // Invalidate all resources of this client if our layout changed.
@@ skipping 148 matching lines @@
   // under the pointer (i.e., there is no target element), the event is not
   // dispatched."
   return false;
 }
 
 SVGTransformChange LayoutSVGContainer::calculateLocalTransform() {
   return SVGTransformChange::None;
 }
 
 }  // namespace blink