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 9e70bc1a76745773a6d5e33b1b4dc8c2fe8343d6..984746d12e33672183216492f56f0fe6100cb343 100644
--- a/third_party/WebKit/public/web/WebFrameOwnerProperties.h
+++ b/third_party/WebKit/public/web/WebFrameOwnerProperties.h
@@ -21,6 +21,7 @@ struct WebFrameOwnerProperties {
   int marginHeight;
   bool allowFullscreen;
   bool allowPaymentRequest;
+  bool isDisplayNone;
   WebString requiredCsp;
   WebVector<WebPermissionType> delegatedPermissions;
 
@@ -29,7 +30,8 @@ struct WebFrameOwnerProperties {
         marginWidth(-1),
         marginHeight(-1),
         allowFullscreen(false),
-        allowPaymentRequest(false) {}
+        allowPaymentRequest(false),
+        isDisplayNone(false) {}
 
 #if INSIDE_BLINK
   WebFrameOwnerProperties(
@@ -39,6 +41,7 @@ struct WebFrameOwnerProperties {
       int marginHeight,
       bool allowFullscreen,
       bool allowPaymentRequest,
+      bool isDisplayNone,
       const WebString& requiredCsp,
       const WebVector<WebPermissionType>& delegatedPermissions)
       : name(name),
@@ -47,6 +50,7 @@ struct WebFrameOwnerProperties {
         marginHeight(marginHeight),
         allowFullscreen(allowFullscreen),
         allowPaymentRequest(allowPaymentRequest),
+        isDisplayNone(isDisplayNone),
         requiredCsp(requiredCsp),
         delegatedPermissions(delegatedPermissions) {}
 #endif