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 71d710bd7aec5c3ccd77e0cea707850cf7320ecb..2fb6879d0a0a56a693fab1ec43cd8072ec7fe4d8 100644
--- a/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
+++ b/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
@@ -783,6 +783,12 @@ 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.