[SPv2] Remove PaintArtifactCompositor::initializeIfNeeded.

third_party/WebKit/Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 2012 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 4528 matching lines @@
     if (!m_layerTreeView)
         return;
 
     // Otherwise, PaintLayerCompositor is expected to supply a root
     // GraphicsLayer via setRootGraphicsLayer.
     ASSERT(RuntimeEnabledFeatures::slimmingPaintV2Enabled());
 
     // TODO(jbroman): This should probably have hookups for overlays, visual
     // viewport, etc.
 
-    m_paintArtifactCompositor.initializeIfNeeded();
     WebLayer* rootLayer = m_paintArtifactCompositor.webLayer();
     ASSERT(rootLayer);
     m_layerTreeView->setRootLayer(*rootLayer);
 
     // TODO(jbroman): This is cargo-culted from setRootGraphicsLayer. Is it
     // necessary?
     m_layerTreeView->setVisible(page()->isPageVisible());
 }
 
 void WebViewImpl::detachPaintArtifactCompositor()
 {
     if (!m_layerTreeView)
         return;
 
     m_layerTreeView->setDeferCommits(true);
     m_layerTreeView->clearRootLayer();
 }
 
 float WebViewImpl::deviceScaleFactor() const
 {
     // TODO(oshima): Investigate if this should return the ScreenInfo's scale factor rather than
     // page's scale factor, which can be 1 in use-zoom-for-dsf mode.
     if (!page())
         return 1;
 
     return page()->deviceScaleFactor();
 }
 
 } // namespace blink