Remove isolatesBlending from render tree dumps

Source/core/rendering/RenderTreeAsText.cpp

 /*
  * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 532 matching lines @@
             ts << " scrollWidth " << l.renderBox()->pixelSnappedScrollWidth();
         if (l.renderBox() && l.renderBox()->pixelSnappedClientHeight() != l.renderBox()->pixelSnappedScrollHeight())
             ts << " scrollHeight " << l.renderBox()->pixelSnappedScrollHeight();
     }
 
     if (paintPhase == LayerPaintPhaseBackground)
         ts << " layerType: background only";
     else if (paintPhase == LayerPaintPhaseForeground)
         ts << " layerType: foreground only";
 
-    if (l.blendInfo().childLayerHasBlendMode())
-        ts << " isolatesBlending";
     if (l.blendInfo().hasBlendMode())
         ts << " blendMode: " << compositeOperatorName(CompositeSourceOver, l.blendInfo().blendMode());
 
     if (behavior & RenderAsTextShowCompositedLayers) {
         if (l.hasCompositedLayerMapping()) {
             ts << " (composited, bounds="
                 << l.compositedLayerMapping()->compositedBounds()
                 << ", drawsContent="
                 << l.compositedLayerMapping()->mainGraphicsLayer()->drawsContent()
                 << ", paints into ancestor="
@@ skipping 209 matching lines @@
     element->document().updateLayout();
 
     RenderObject* renderer = element->renderer();
     if (!renderer || !renderer->isListItem())
         return String();
 
     return toRenderListItem(renderer)->markerText();
 }
 
 } // namespace blink