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

third_party/WebKit/public/web/WebFrameOwnerProperties.h

Index: third_party/WebKit/public/web/WebFrameOwnerProperties.h
diff --git a/third_party/WebKit/public/web/WebFrameOwnerProperties.h b/third_party/WebKit/public/web/WebFrameOwnerProperties.h
index bc3cee54401f55c0a909b505f82fac461efe196f..ac09ec22e3abb0497783cede6903d442c1754602 100644
--- a/third_party/WebKit/public/web/WebFrameOwnerProperties.h
+++ b/third_party/WebKit/public/web/WebFrameOwnerProperties.h
@@ -20,6 +20,7 @@ struct WebFrameOwnerProperties {
   int marginHeight;
   bool allowFullscreen;
   bool allowPaymentRequest;
+  bool isDisplayNone;
   WebString requiredCsp;
   WebVector<WebPermissionType> delegatedPermissions;
 
@@ -28,7 +29,8 @@ struct WebFrameOwnerProperties {
         marginWidth(-1),
         marginHeight(-1),
         allowFullscreen(false),
-        allowPaymentRequest(false) {}
+        allowPaymentRequest(false),
+        isDisplayNone(false) {}
 
 #if INSIDE_BLINK
   WebFrameOwnerProperties(
@@ -37,6 +39,7 @@ struct WebFrameOwnerProperties {
       int marginHeight,
       bool allowFullscreen,
       bool allowPaymentRequest,
+      bool isDisplayNone,
       const WebString& requiredCsp,
       const WebVector<WebPermissionType>& delegatedPermissions)
       : scrollingMode(static_cast<ScrollingMode>(scrollingMode)),
@@ -44,6 +47,7 @@ struct WebFrameOwnerProperties {
         marginHeight(marginHeight),
         allowFullscreen(allowFullscreen),
         allowPaymentRequest(allowPaymentRequest),
+        isDisplayNone(isDisplayNone),
         requiredCsp(requiredCsp),
         delegatedPermissions(delegatedPermissions) {}
 #endif