Propagate inert state to OOPIFs when a modal dialog is active

third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp

Index: third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp b/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
index 5b818322d6aa53be076d63e72af83adb14e6998e..cd56195ffade9f02f2083bf1a34648a07f9521fe 100644
--- a/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
+++ b/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
@@ -772,6 +772,11 @@ void WebFrameWidgetImpl::SetRemoteViewportIntersection(
   }
 }
 
+void WebFrameWidgetImpl::SetIsInert(bool inert) {
+  DCHECK(local_root_->Parent() && local_root_->Parent()->IsWebRemoteFrame());
+  local_root_->GetFrame()->SetIsInert(inert);
+}
+
 void WebFrameWidgetImpl::HandleMouseLeave(LocalFrame& main_frame,
                                           const WebMouseEvent& event) {
   // FIXME: WebWidget doesn't have the method below.