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

third_party/WebKit/Source/web/WebFrame.cpp

 // Copyright 2014 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 "public/web/WebFrame.h"
 
 #include "bindings/core/v8/WindowProxyManager.h"
 #include "core/HTMLNames.h"
 #include "core/frame/FrameHost.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/RemoteFrame.h"
 #include "core/html/HTMLFrameElementBase.h"
 #include "core/html/HTMLFrameOwnerElement.h"
 #include "core/page/Page.h"
 #include "platform/UserGestureIndicator.h"
 #include "platform/heap/Handle.h"
 #include "public/web/WebElement.h"
 #include "public/web/WebFrameOwnerProperties.h"
 #include "public/web/WebSandboxFlags.h"
 #include "web/OpenedFrameTracker.h"
 #include "web/RemoteFrameOwner.h"
 #include "web/WebLocalFrameImpl.h"
 #include "web/WebRemoteFrameImpl.h"
 #include <algorithm>
-
 namespace blink {
 
 bool WebFrame::swap(WebFrame* frame) {
   using std::swap;
   Frame* oldFrame = toImplBase()->frame();
   if (oldFrame->isDetaching())
     return false;
 
   // Unload the current Document in this frame: this calls unload handlers,
   // detaches child frames, etc. Since this runs script, make sure this frame
@@ skipping 102 matching lines @@
   // for frames with a remote owner.
   RemoteFrameOwner* owner = toRemoteFrameOwner(toImplBase()->frame()->owner());
   DCHECK(owner);
 
   Frame* frame = toImplBase()->frame();
   DCHECK(frame);
 
   if (frame->isLocalFrame()) {
     toLocalFrame(frame)->document()->willChangeFrameOwnerProperties(
         properties.marginWidth, properties.marginHeight,
-        static_cast<ScrollbarMode>(properties.scrollingMode));
+        static_cast<ScrollbarMode>(properties.scrollingMode),
+        properties.isDisplayNone);
   }
 
   owner->setScrollingMode(properties.scrollingMode);
   owner->setMarginWidth(properties.marginWidth);
   owner->setMarginHeight(properties.marginHeight);
   owner->setAllowFullscreen(properties.allowFullscreen);
+  owner->setIsDisplayNone(properties.isDisplayNone);
   owner->setCsp(properties.requiredCsp);
   owner->setDelegatedpermissions(properties.delegatedPermissions);
 }
 
 WebFrame* WebFrame::opener() const {
   return m_opener;
 }
 
 void WebFrame::setOpener(WebFrame* opener) {
   if (m_opener)
@@ skipping 170 matching lines @@
   void WebFrame::clearWeakFrames(VisitorDispatcher visitor) {              \
     clearWeakFramesImpl(visitor);                                          \
   }
 
 DEFINE_VISITOR_METHOD(Visitor*)
 DEFINE_VISITOR_METHOD(InlinedGlobalMarkingVisitor)
 
 #undef DEFINE_VISITOR_METHOD
 
 }  // namespace blink