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 6c6229206f60bef3f80699470ae1c146f9b393c2..33180e72ff7849a857035b2d987fe35b6170fcfe 100644
--- a/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
+++ b/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
@@ -777,6 +777,12 @@ void WebFrameWidgetImpl::SetRemoteViewportIntersection(
       viewport_intersection);
 }
 
+void WebFrameWidgetImpl::SetIsInert(bool inert) {
+  DCHECK(local_root_->Parent());
+  DCHECK(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.