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

third_party/WebKit/public/web/WebFrame.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 538 matching lines @@
     // TODO(dcheng): Fix const-correctness issues and remove this overload.
     virtual const WebFrameImplBase* toImplBase() const
     {
         return const_cast<WebFrame*>(this)->toImplBase();
     }
 
     // Returns the frame inside a given frame or iframe element. Returns 0 if
     // the given element is not a frame, iframe or if the frame is empty.
     BLINK_EXPORT static WebFrame* fromFrameOwnerElement(const WebElement&);
 
+    // Use WebDocument::isSecureContext() instead of this function to
+    // check whether a context is secure.
+    //
+    // Returns whether it's possible for a descendant of this frame to be a
+    // secure context, not considering scheme exceptions (since any
+    // descendant can be a secure context if it has a scheme exception).
+    // See Document::isSecureContextImpl for more details.
+    BLINK_EXPORT bool canHaveSecureChild() const;
+
 #if BLINK_IMPLEMENTATION
     static WebFrame* fromFrame(Frame*);
 
     bool inShadowTree() const { return m_scope == WebTreeScopeType::Shadow; }
 
     static void traceFrames(Visitor*, WebFrame*);
     static void traceFrames(InlinedGlobalMarkingVisitor, WebFrame*);
     void clearWeakFrames(Visitor*);
     void clearWeakFrames(InlinedGlobalMarkingVisitor);
 #endif
@@ skipping 32 matching lines @@
     WebFrame* m_firstChild;
     WebFrame* m_lastChild;
 
     WebFrame* m_opener;
     WebPrivateOwnPtr<OpenedFrameTracker> m_openedFrameTracker;
 };
 
 } // namespace blink
 
 #endif