Get rid of the full invalidation bool on FrameView.

sky/engine/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 103 matching lines @@
 #endif
 }
 
 #if ENABLE(ASSERT)
 void RenderView::checkLayoutState()
 {
     ASSERT(!m_layoutState->next());
 }
 #endif
 
-bool RenderView::shouldDoFullPaintInvalidationForNextLayout() const
-{
-    // It's hard to predict here which of full paint invalidation or per-descendant paint invalidation costs less.
-    // For vertical writing mode or width change it's more likely that per-descendant paint invalidation
-    // eventually turns out to be full paint invalidation but with the cost to handle more layout states
-    // and discrete paint invalidation rects, so marking full paint invalidation here is more likely to cost less.
-    // Otherwise, per-descendant paint invalidation is more likely to avoid unnecessary full paint invalidation.
-
-    if (width() != viewWidth())
-        return true;
-
-    if (height() != viewHeight()) {
-        if (RenderObject* backgroundRenderer = this->backgroundRenderer()) {
-            // When background-attachment is 'fixed', we treat the viewport (instead of the 'root'
-            // i.e. html or body) as the background positioning area, and we should full paint invalidation
-            // viewport resize if the background image is not composited and needs full paint invalidation on
-            // background positioning area resize.
-            if (backgroundRenderer->style()->hasFixedBackgroundImage()
-                && mustInvalidateFillLayersPaintOnHeightChange(backgroundRenderer->style()->backgroundLayers()))
-            return true;
-        }
-    }
-
-    return false;
-}
-
 void RenderView::layout()
 {
     SubtreeLayoutScope layoutScope(*this);
 
     bool relayoutChildren = (!m_frameView || width() != viewWidth() || height() != viewHeight());
     if (relayoutChildren) {
         layoutScope.setChildNeedsLayout(this);
         for (RenderObject* child = firstChild(); child; child = child->nextSibling()) {
             if ((child->isBox() && toRenderBox(child)->hasRelativeLogicalHeight())
                     || child->style()->logicalHeight().isPercent()
@@ skipping 390 matching lines @@
     m_iframes.remove(iframe);
 }
 
 void RenderView::updateIFramesAfterLayout()
 {
     for (auto& iframe: m_iframes)
         iframe->updateWidgetBounds();
 }
 
 } // namespace blink