[Reland #1] Don't create layout objects for children of display-none iframes.

third_party/WebKit/Source/web/WebLocalFrameImpl.cpp

 /*
  * Copyright (C) 2009 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 1640 matching lines @@
     HTMLFrameOwnerElement* ownerElement) {
   DCHECK(m_client);
   TRACE_EVENT0("blink", "WebLocalFrameImpl::createChildframe");
   WebTreeScopeType scope = frame()->document() == ownerElement->treeScope()
                                ? WebTreeScopeType::Document
                                : WebTreeScopeType::Shadow;
   WebFrameOwnerProperties ownerProperties(
       ownerElement->browsingContextContainerName(),
       ownerElement->scrollingMode(), ownerElement->marginWidth(),
       ownerElement->marginHeight(), ownerElement->allowFullscreen(),
-      ownerElement->allowPaymentRequest(), ownerElement->csp(),
-      ownerElement->allowedFeatures());
+      ownerElement->allowPaymentRequest(), ownerElement->isDisplayNone(),
+      ownerElement->csp(), ownerElement->allowedFeatures());
   // FIXME: Using subResourceAttributeName as fallback is not a perfect
   // solution. subResourceAttributeName returns just one attribute name. The
   // element might not have the attribute, and there might be other attributes
   // which can identify the element.
   WebLocalFrameImpl* webframeChild =
       toWebLocalFrameImpl(m_client->createChildFrame(
           this, scope, name,
           ownerElement->getAttribute(ownerElement->subResourceAttributeName()),
           static_cast<WebSandboxFlags>(ownerElement->getSandboxFlags()),
           ownerProperties));
@@ skipping 842 matching lines @@
         createMarkup(startPosition, endPosition, AnnotateForInterchange,
                      ConvertBlocksToInlines::NotConvert, ResolveNonLocalURLs);
   } else {
     clipHtml =
         createMarkup(endPosition, startPosition, AnnotateForInterchange,
                      ConvertBlocksToInlines::NotConvert, ResolveNonLocalURLs);
   }
 }
 
 }  // namespace blink