Reenable framebusting deprecation, change it to allow navigation if iframe has ever had a user gestu

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

Index: third_party/WebKit/Source/core/dom/Document.h
diff --git a/third_party/WebKit/Source/core/dom/Document.h b/third_party/WebKit/Source/core/dom/Document.h
index 474ff9128436f0d7bbf48f257d3190dda4a877c5..43bff59fb591ed0f7dc4cbce7e8c6ba86252809c 100644
--- a/third_party/WebKit/Source/core/dom/Document.h
+++ b/third_party/WebKit/Source/core/dom/Document.h
@@ -1279,6 +1279,9 @@ class CORE_EXPORT Document : public ContainerNode,
 
   PropertyRegistry* propertyRegistry();
 
+  void setHasReceivedUserGesture() { m_hasReceivedUserGesture = true; }
+  bool hasReceivedUserGesture() const { return m_hasReceivedUserGesture; }
+
  protected:
   Document(const DocumentInit&, DocumentClassFlags = DefaultDocumentClass);
 
@@ -1522,6 +1525,7 @@ class CORE_EXPORT Document : public ContainerNode,
 
   bool m_designMode;
   bool m_isRunningExecCommand;
+  bool m_hasReceivedUserGesture;
 
   HeapHashSet<WeakMember<const LiveNodeListBase>> m_listsInvalidatedAtDocument;
   // Oilpan keeps track of all registered NodeLists.