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

third_party/WebKit/Source/core/layout/LayoutView.cpp

Index: third_party/WebKit/Source/core/layout/LayoutView.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutView.cpp b/third_party/WebKit/Source/core/layout/LayoutView.cpp
index f211a982b81cdf218b5e0441a5a251c52b194d3a..0daccaf3c403177d8f3a02ada90ec7e15f1083c4 100644
--- a/third_party/WebKit/Source/core/layout/LayoutView.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutView.cpp
@@ -188,6 +188,13 @@ bool LayoutView::isChildAllowed(LayoutObject* child,
   return child->isBox();
 }
 
+bool LayoutView::canHaveChildren() const {
+  FrameOwner* owner = frame()->owner();
+  if (!owner)
+    return true;
+  return !owner->isDisplayNone();
+}
+
 void LayoutView::layoutContent() {
   ASSERT(needsLayout());