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

third_party/WebKit/Source/core/input/TouchEventManager.cpp

Index: third_party/WebKit/Source/core/input/TouchEventManager.cpp
diff --git a/third_party/WebKit/Source/core/input/TouchEventManager.cpp b/third_party/WebKit/Source/core/input/TouchEventManager.cpp
index 52ae9710746a4ad865c38584592e5da2331c8e9c..ba4d3b260e36eee587386dddd8f3ecda309e3f07 100644
--- a/third_party/WebKit/Source/core/input/TouchEventManager.cpp
+++ b/third_party/WebKit/Source/core/input/TouchEventManager.cpp
@@ -540,6 +540,10 @@ WebInputEventResult TouchEventManager::handleTouchEvent(
           new UserGestureIndicator(DefinitelyProcessingUserGesture, callback));
     m_touchSequenceUserGestureToken = UserGestureIndicator::currentToken();
   }
+  // TODO(japhet): UserGestureIndicator should setHasReceivedUserGesture()
+  // on the Document.
+  if (UserGestureIndicator::processingUserGesture())
+    m_frame->document()->setHasReceivedUserGesture();

[Rick Byers, 2016/10/06 16:26:47]

I believe this is the wrong document.  Here m_frame is, I believe, always the
local root frame (though there should at least be asserts for that - see
http://crbug.com/449649).  Instead, for touch events, you want
m_touchSequenceDocument.

 
   return dispatchTouchEvents(event, touchInfos, allTouchesReleased);
 }