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

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

Index: third_party/WebKit/Source/core/input/PointerEventManager.cpp
diff --git a/third_party/WebKit/Source/core/input/PointerEventManager.cpp b/third_party/WebKit/Source/core/input/PointerEventManager.cpp
index 5412a7958e67e1d03fd707b721ea9e5f6f155612..2fc6931fc3059fa6d42cf7ad95afaec8136dfb5a 100644
--- a/third_party/WebKit/Source/core/input/PointerEventManager.cpp
+++ b/third_party/WebKit/Source/core/input/PointerEventManager.cpp
@@ -287,6 +287,10 @@ void PointerEventManager::unblockTouchPointers() {
 
 WebInputEventResult PointerEventManager::handleTouchEvents(
     const PlatformTouchEvent& event) {
+  // TODO(japhet): UserGestureIndicator should setHasReceivedUserGesture()
+  // on the Document.
+  if (UserGestureIndicator::processingUserGesture())

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

I think this is also always the root frame document.  But it doesn't matter
because (I think) there's never a UGI at this point anyway
(http://crbug.com/609363).  Maybe just drop this for now and ask Navid to make
sure he adds the necessary call when he fixes his bug?

+    m_frame->document()->setHasReceivedUserGesture();
   if (event.type() == PlatformEvent::TouchScrollStarted) {
     blockTouchPointers();
     m_touchEventManager->setTouchScrollStarted();