Reenable framebusting

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 d4cd560b21112be05f6d9490d75fc9094af9825b..0c47ab2a64071a25f87ab322aebdee6923860a53 100644
--- a/third_party/WebKit/Source/core/dom/DocumentUserGestureToken.h
+++ b/third_party/WebKit/Source/core/dom/DocumentUserGestureToken.h
@@ -36,9 +36,12 @@ class DocumentUserGestureToken final : public UserGestureToken {
   DocumentUserGestureToken(Status status) : UserGestureToken(status) {}
 
   static void setHasReceivedUserGesture(Document* document) {
-    if (!document || document->hasReceivedUserGesture())
+    if (!document || !document->frame() ||
+        document->frame()->hasReceivedUserGesture()) {
       return;
-    document->setHasReceivedUserGesture();
+    }
+
+    document->frame()->setDocumentHasReceivedUserGesture();

[dcheng, 2017/01/12 10:41:00]

Nit: perhaps remove 'document' from the name, since it's stick to frame now.

     for (Frame* frame = document->frame()->tree().parent(); frame;
          frame = frame->tree().parent()) {
       frame->setDocumentHasReceivedUserGesture();