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

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

Index: third_party/WebKit/Source/core/input/KeyboardEventManager.cpp
diff --git a/third_party/WebKit/Source/core/input/KeyboardEventManager.cpp b/third_party/WebKit/Source/core/input/KeyboardEventManager.cpp
index c60a3ee76c308c14bd275a356f3ff12a8b1d0e67..528dcf916efcdf59b05f6395f539004620c2eff2 100644
--- a/third_party/WebKit/Source/core/input/KeyboardEventManager.cpp
+++ b/third_party/WebKit/Source/core/input/KeyboardEventManager.cpp
@@ -104,7 +104,10 @@ WebInputEventResult KeyboardEventManager::keyEvent(
   if (!node)
     return WebInputEventResult::NotHandled;
 
+  // TODO(japhet): UserGestureIndicator should setHasReceivedUserGesture()
+  // on the Document.
   UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture);
+  m_frame->document()->setHasReceivedUserGesture();
 
   // In IE, access keys are special, they are handled after default keydown
   // processing, but cannot be canceled - this is hard to match.  On Mac OS X,