Revert of Reland "Implement FullScreen using top layer."

third_party/WebKit/Source/core/dom/PseudoElement.cpp

Index: third_party/WebKit/Source/core/dom/PseudoElement.cpp
diff --git a/third_party/WebKit/Source/core/dom/PseudoElement.cpp b/third_party/WebKit/Source/core/dom/PseudoElement.cpp
index a8fbed8f8782e14537e43adf5d74f6409c0be929..1b15a9a87ef0a6d8e5ddade8344cfd1988a34baa 100644
--- a/third_party/WebKit/Source/core/dom/PseudoElement.cpp
+++ b/third_party/WebKit/Source/core/dom/PseudoElement.cpp
@@ -29,7 +29,6 @@
 #include "core/dom/FirstLetterPseudoElement.h"
 #include "core/frame/UseCounter.h"
 #include "core/inspector/InspectorInstrumentation.h"
-#include "core/layout/GeneratedChildren.h"
 #include "core/layout/LayoutObject.h"
 #include "core/layout/LayoutQuote.h"
 #include "core/style/ContentData.h"
@@ -125,13 +124,6 @@ void PseudoElement::attachLayoutTree(const AttachContext& context)
     if (!layoutObject)
         return;
 
-    // This is to ensure that bypassing the canHaveGeneratedChildren check in
-    // StyleResolver::createPseudoElementIfNeeded does not result in the
-    // backdrop pseudo element's layout object becoming the child of a layout
-    // object that doesn't allow children.
-    DCHECK(layoutObject->parent());
-    DCHECK(canHaveGeneratedChildren(*layoutObject->parent()));
-
     ComputedStyle& style = layoutObject->mutableStyleRef();
     if (style.styleType() != PseudoIdBefore && style.styleType() != PseudoIdAfter)
         return;