Document user gesture state should be able to propagate over postMessage

third_party/WebKit/Source/core/dom/DocumentUserGestureToken.h

Index: third_party/WebKit/Source/core/dom/DocumentUserGestureToken.h
diff --git a/third_party/WebKit/Source/core/dom/DocumentUserGestureToken.h b/third_party/WebKit/Source/core/dom/DocumentUserGestureToken.h
index a5e7ef5530edfc61c76becda8f691f7265065246..d4cd560b21112be05f6d9490d75fc9094af9825b 100644
--- a/third_party/WebKit/Source/core/dom/DocumentUserGestureToken.h
+++ b/third_party/WebKit/Source/core/dom/DocumentUserGestureToken.h
@@ -20,14 +20,22 @@ class DocumentUserGestureToken final : public UserGestureToken {
   static PassRefPtr<UserGestureToken> create(
       Document* document,
       Status status = PossiblyExistingGesture) {
-    return adoptRef(new DocumentUserGestureToken(document, status));
+    setHasReceivedUserGesture(document);
+    return adoptRef(new DocumentUserGestureToken(status));
   }
 
-  ~DocumentUserGestureToken() final {}
+  static PassRefPtr<UserGestureToken> adopt(Document* document,
+                                            UserGestureToken* token) {
+    if (!token || !token->hasGestures())
+      return nullptr;
+    setHasReceivedUserGesture(document);
+    return token;
+  }
 
  private:
-  DocumentUserGestureToken(Document* document, Status status)
-      : UserGestureToken(status) {
+  DocumentUserGestureToken(Status status) : UserGestureToken(status) {}
+
+  static void setHasReceivedUserGesture(Document* document) {
     if (!document || document->hasReceivedUserGesture())
       return;
     document->setHasReceivedUserGesture();