NOT FOR REVIEW: Fullscreen WIP

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

 /*
  * Copyright (C) 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.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 11 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "core/dom/PseudoElement.h"
 
 #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"
 
 namespace blink {
 
 PseudoElement* PseudoElement::create(Element* parent, PseudoId pseudoId) {
   return new PseudoElement(parent, pseudoId);
 }
 
@@ skipping 76 matching lines @@
 
 void PseudoElement::attachLayoutTree(const AttachContext& context) {
   DCHECK(!layoutObject());
 
   Element::attachLayoutTree(context);
 
   LayoutObject* layoutObject = this->layoutObject();
   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;
   DCHECK(style.contentData());
 
   for (const ContentData* content = style.contentData(); content;
        content = content->next()) {
     LayoutObject* child = content->createLayoutObject(document(), style);
     if (layoutObject->isChildAllowed(child, style)) {
       layoutObject->addChild(child);
@@ skipping 51 matching lines @@
   LayoutObject* ancestor = layoutObject()->parent();
   while (ancestor->isAnonymous() ||
          (ancestor->node() && ancestor->node()->isPseudoElement())) {
     DCHECK(ancestor->parent());
     ancestor = ancestor->parent();
   }
   return ancestor->node();
 }
 
 }  // namespace blink