ASSERT on renderer lifecycle

Source/core/rendering/RenderFullScreen.cpp

Index: Source/core/rendering/RenderFullScreen.cpp
diff --git a/Source/core/rendering/RenderFullScreen.cpp b/Source/core/rendering/RenderFullScreen.cpp
index bca1d5b9d1cb4bf92d9e00c77339391b43297c36..2abefb8fe97f9cd3faeb73208d69ba7a16d0979f 100644
--- a/Source/core/rendering/RenderFullScreen.cpp
+++ b/Source/core/rendering/RenderFullScreen.cpp
@@ -110,6 +110,10 @@ static PassRefPtr<RenderStyle> createFullScreenStyle()
 
 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())) {
@@ -146,6 +150,10 @@ RenderObject* RenderFullScreen::wrapRenderer(RenderObject* object, RenderObject*
 
 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())) {