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

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "KeyboardEventManager.h"
 
 #include "core/dom/Element.h"
 #include "core/editing/Editor.h"
 #include "core/events/KeyboardEvent.h"
 #include "core/html/HTMLDialogElement.h"
@@ skipping 86 matching lines @@
     // If we were in panscroll mode, we swallow the key event
     return WebInputEventResult::HandledSuppressed;
   }
 
   // Check for cases where we are too early for events -- possible unmatched key
   // up from pressing return in the location bar.
   Node* node = eventTargetNodeForDocument(m_frame->document());
   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,
   // we process them before dispatching keydown, as the default keydown handler
   // implements Emacs key bindings, which may conflict with access keys. Then we
   // dispatch keydown, but suppress its default handling.
   // On Windows, WebKit explicitly calls handleAccessKey() instead of
   // dispatching a keypress event for WM_SYSCHAR messages.  Other platforms
   // currently match either Mac or Windows behavior, depending on whether they
   // send combined KeyDown events.
@@ skipping 254 matching lines @@
   if (currentModifiers & ::cmdKey)
     modifiers |= WebInputEvent::MetaKey;
 #else
   // TODO(crbug.com/538289): Implement on other platforms.
   return static_cast<WebInputEvent::Modifiers>(0);
 #endif
   return static_cast<WebInputEvent::Modifiers>(modifiers);
 }
 
 }  // namespace blink