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

content/common/frame_owner_properties.cc

 // Copyright 2016 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 "content/common/frame_owner_properties.h"
 
 namespace content {
 
 FrameOwnerProperties::FrameOwnerProperties()
     : scrolling_mode(blink::WebFrameOwnerProperties::ScrollingMode::Auto),
       margin_width(-1),
       margin_height(-1),
       allow_fullscreen(false),
-      allow_payment_request(false) {}
+      allow_payment_request(false),
+      is_display_none(false) {}
 
 FrameOwnerProperties::FrameOwnerProperties(const FrameOwnerProperties& other) =
     default;
 
 FrameOwnerProperties::FrameOwnerProperties(
     const blink::WebFrameOwnerProperties& web_frame_owner_properties)
     : scrolling_mode(web_frame_owner_properties.scrollingMode),
       margin_width(web_frame_owner_properties.marginWidth),
       margin_height(web_frame_owner_properties.marginHeight),
       allow_fullscreen(web_frame_owner_properties.allowFullscreen),
       allow_payment_request(web_frame_owner_properties.allowPaymentRequest),
+      is_display_none(web_frame_owner_properties.isDisplayNone),
       required_csp(web_frame_owner_properties.requiredCsp.utf8()),
       delegated_permissions(
           web_frame_owner_properties.delegatedPermissions.begin(),
           web_frame_owner_properties.delegatedPermissions.end()) {}
 
 FrameOwnerProperties::~FrameOwnerProperties() {}
 
 blink::WebFrameOwnerProperties FrameOwnerProperties::ToWebFrameOwnerProperties()
     const {
   blink::WebFrameOwnerProperties result;
 
   result.scrollingMode = scrolling_mode;
   result.marginWidth = margin_width;
   result.marginHeight = margin_height;
   result.allowFullscreen = allow_fullscreen;
   result.allowPaymentRequest = allow_payment_request;
+  result.isDisplayNone = is_display_none;
   result.requiredCsp = blink::WebString::fromUTF8(required_csp);
   result.delegatedPermissions =
       blink::WebVector<blink::WebPermissionType>(delegated_permissions);
 
   return result;
 }
 
 bool FrameOwnerProperties::operator==(const FrameOwnerProperties& other) const {
   return scrolling_mode == other.scrolling_mode &&
          margin_width == other.margin_width &&
          margin_height == other.margin_height &&
          allow_fullscreen == other.allow_fullscreen &&
          allow_payment_request == other.allow_payment_request &&
+         is_display_none == other.is_display_none &&
          required_csp == other.required_csp &&
          std::equal(delegated_permissions.begin(), delegated_permissions.end(),
                     other.delegated_permissions.begin());
 }
 
 }  // namespace content