ASSERT on renderer lifecycle

Source/core/rendering/RenderFullScreen.cpp

 /*
  * Copyright (C) 2010 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 92 matching lines @@
     fullscreenStyle->setLeft(Length(0, WebCore::Fixed));
     fullscreenStyle->setTop(Length(0, WebCore::Fixed));
 
     fullscreenStyle->setBackgroundColor(StyleColor(Color::black));
 
     return fullscreenStyle.release();
 }
 
 RenderObject* RenderFullScreen::wrapRenderer(RenderObject* object, RenderObject* parent, Document* document)
 {
+    // FIXME: We should not modify the structure of the render tree during
+    // layout. crbug.com/370459
+    DeprecatedDisableModifyRenderTreeStructureAsserts disabler;
+
     RenderFullScreen* fullscreenRenderer = RenderFullScreen::createAnonymous(document);
     fullscreenRenderer->setStyle(createFullScreenStyle());
     if (parent && !parent->isChildAllowed(fullscreenRenderer, fullscreenRenderer->style())) {
         fullscreenRenderer->destroy();
         return 0;
     }
     if (object) {
         // |object->parent()| can be null if the object is not yet attached
         // to |parent|.
         if (RenderObject* parent = object->parent()) {
@@ skipping 16 matching lines @@
         fullscreenRenderer->setNeedsLayoutAndPrefWidthsRecalc();
     }
 
     ASSERT(document);
     FullscreenElementStack::from(*document).setFullScreenRenderer(fullscreenRenderer);
     return fullscreenRenderer;
 }
 
 void RenderFullScreen::unwrapRenderer()
 {
+    // FIXME: We should not modify the structure of the render tree during
+    // layout. crbug.com/370459
+    DeprecatedDisableModifyRenderTreeStructureAsserts disabler;
+
     if (parent()) {
         RenderObject* child;
         while ((child = firstChild())) {
             // We have to clear the override size, because as a flexbox, we
             // may have set one on the child, and we don't want to leave that
             // lying around on the child.
             if (child->isBox())
                 toRenderBox(child)->clearOverrideSize();
             child->remove();
             parent()->addChild(child, this);
@@ skipping 21 matching lines @@
     if (!m_placeholder) {
         m_placeholder = new RenderFullScreenPlaceholder(this);
         m_placeholder->setStyle(style);
         if (parent()) {
             parent()->addChild(m_placeholder, this);
             parent()->setNeedsLayoutAndPrefWidthsRecalc();
         }
     } else
         m_placeholder->setStyle(style);
 }