Remove NPAPI support from Chrome Frame.

chrome_frame/navigation_constraints.h

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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.
 
 #ifndef CHROME_FRAME_NAVIGATION_CONSTRAINTS_H_
 #define CHROME_FRAME_NAVIGATION_CONSTRAINTS_H_
 
 #include <urlmon.h>
 #include <windows.h>
 
 #include "base/win/scoped_comptr.h"
@@ skipping 19 matching lines @@
   virtual bool IsSchemeAllowed(const GURL& url);
   virtual bool IsZoneAllowed(const GURL& url);
 
   bool is_privileged() const;
   void set_is_privileged(bool is_privileged);
 
  private:
   base::win::ScopedComPtr<IInternetSecurityManager> security_manager_;
 
   // The plugin is privileged if it is:
-  // * Invoked by a window running under the system principal in FireFox.
   // * Being hosted by a custom host exposing the SID_ChromeFramePrivileged
   //   service.
   //
   // When privileged, additional interfaces are made available to the user.
   bool is_privileged_;
 };
 
 #endif  // CHROME_FRAME_NAVIGATION_CONSTRAINTS_H_