Don't create layout objects for children of display-none iframes.

third_party/WebKit/Source/web/RemoteFrameOwner.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be found
 // in the LICENSE file.
 
 #include "web/RemoteFrameOwner.h"
 
 #include "core/frame/LocalFrame.h"
 #include "public/web/WebFrameClient.h"
 #include "web/WebLocalFrameImpl.h"
 
 namespace blink {
 
 RemoteFrameOwner::RemoteFrameOwner(
     SandboxFlags flags,
     const WebFrameOwnerProperties& frameOwnerProperties)
     : m_sandboxFlags(flags),
       m_scrolling(
           static_cast<ScrollbarMode>(frameOwnerProperties.scrollingMode)),
       m_marginWidth(frameOwnerProperties.marginWidth),
       m_marginHeight(frameOwnerProperties.marginHeight),
       m_allowFullscreen(frameOwnerProperties.allowFullscreen),
       m_allowPaymentRequest(frameOwnerProperties.allowPaymentRequest),
+      m_isDisplayNone(frameOwnerProperties.isDisplayNone),
       m_csp(frameOwnerProperties.requiredCsp) {}
 
 DEFINE_TRACE(RemoteFrameOwner) {
   visitor->trace(m_frame);
   FrameOwner::trace(visitor);
 }
 
 void RemoteFrameOwner::setScrollingMode(
     WebFrameOwnerProperties::ScrollingMode mode) {
   m_scrolling = static_cast<ScrollbarMode>(mode);
 }
 
 void RemoteFrameOwner::setContentFrame(Frame& frame) {
   m_frame = &frame;
 }
 
 void RemoteFrameOwner::clearContentFrame() {
   DCHECK_EQ(m_frame->owner(), this);
   m_frame = nullptr;
 }
 
 void RemoteFrameOwner::dispatchLoad() {
   WebLocalFrameImpl* webFrame =
       WebLocalFrameImpl::fromFrame(toLocalFrame(*m_frame));
   webFrame->client()->dispatchLoad();
 }
 
 }  // namespace blink