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 dbf24300948695646d45183b83c1007d842adeab..bd5f7a1dd8a2f9f5d2a34640659799ff2e37b19b 100644
--- a/third_party/WebKit/Source/core/dom/Document.h
+++ b/third_party/WebKit/Source/core/dom/Document.h
@@ -1284,6 +1284,10 @@ class CORE_EXPORT Document : public ContainerNode,
 
   PropertyRegistry* propertyRegistry();
 
+  void setHasReceivedUserGesture() { m_hasReceivedUserGesture = true; }

[Rick Byers, 2016/10/17 17:02:46]

Nit: add a short comment describing why this is meaningful (eg. indicates the
user has done something to interact with this document in particular).

[Nate Chapin, 2016/10/18 23:26:33]

Done.

+  void clearHasReceivedUserGesture() { m_hasReceivedUserGesture = false; }

[Rick Byers, 2016/10/17 17:02:46]

I'm surprised you ever need to clear (I'm sure I'll see where it's being used
soon).  Maybe worth a comment explaining when it makes sense to invoke this?

[Nate Chapin, 2016/10/18 23:26:33]

Done.

+  bool hasReceivedUserGesture() const { return m_hasReceivedUserGesture; }
+
  protected:
   Document(const DocumentInit&, DocumentClassFlags = DefaultDocumentClass);
 
@@ -1529,6 +1533,7 @@ 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.