service worker: Don't control a subframe of an insecure context

third_party/WebKit/Source/core/frame/Frame.h

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999-2001 Lars Knoll <knoll@kde.org>
  *                     1999-2001 Antti Koivisto <koivisto@kde.org>
  *                     2000-2001 Simon Hausmann <hausmann@kde.org>
  *                     2000-2001 Dirk Mueller <mueller@kde.org>
  *                     2000 Stefan Schimanski <1Stein@gmx.de>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
@@ skipping 118 matching lines @@
     // In the case of LocalFrames, it means that the frame has sent a didStartLoading()
     // callback, but not the matching didStopLoading(). Inside blink, you probably
     // want Document::loadEventFinished() instead.
     void setIsLoading(bool isLoading) { m_isLoading = isLoading; }
     bool isLoading() const { return m_isLoading; }
 
     virtual WindowProxyManager* getWindowProxyManager() const = 0;
 
     virtual void didChangeVisibilityState();
 
+    // Returns whether it's possible for a descendent of this frame to
+    // be a secure context.
+    bool canHaveSecureChild(String* errorMessage) const;
+
 protected:
     Frame(FrameClient*, FrameHost*, FrameOwner*);
 
     mutable FrameTree m_treeNode;
 
     Member<FrameHost> m_host;
     Member<FrameOwner> m_owner;
 
 private:
     bool canNavigateWithoutFramebusting(const Frame&, String& errorReason);
@@ skipping 16 matching lines @@
 {
     return m_treeNode;
 }
 
 // Allow equality comparisons of Frames by reference or pointer, interchangeably.
 DEFINE_COMPARISON_OPERATORS_WITH_REFERENCES_REFCOUNTED(Frame)
 
 } // namespace blink
 
 #endif // Frame_h