Move persistent gesture state to Document, add DocumentUserGestureToken

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 689ee02c0a7bb76f715799464e55dd211e201927..7094eac0359be99f4d39e60f696bf348c6085e84 100644
--- a/third_party/WebKit/Source/core/dom/Document.h
+++ b/third_party/WebKit/Source/core/dom/Document.h
@@ -1289,6 +1289,14 @@ class CORE_EXPORT Document : public ContainerNode,
 
   PropertyRegistry* propertyRegistry();
 
+  // Indicates whether the user has interacted with this particular Document.
+  void setHasReceivedUserGesture() { m_hasReceivedUserGesture = true; }
+  // Consume user interaction state. Used for an experiment that restricts
+  // adding history entries to Documents that have had a user gesture since
+  // last history state change.
+  void clearHasReceivedUserGesture() { m_hasReceivedUserGesture = false; }
+  bool hasReceivedUserGesture() const { return m_hasReceivedUserGesture; }
+
  protected:
   Document(const DocumentInit&, DocumentClassFlags = DefaultDocumentClass);
 
@@ -1533,6 +1541,7 @@ 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.