Remove NPAPI support from Chrome Frame.

chrome_frame/external_tab.h

 // 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_EXTERNAL_TAB_H_
 #define CHROME_FRAME_EXTERNAL_TAB_H_
 #pragma once
 
 #include <windows.h>
 #include <atlbase.h>
@@ skipping 59 matching lines @@
   bool is_incognito;
   bool is_widget_mode;
   GURL url;
   GURL referrer;
 };
 
 class NavigationConstraints;
 
 /////////////////////////////////////////////////////////////////////////
 //  ExternalTabProxy is a mediator between ChromeProxy (which runs mostly in
-//  background IPC-channel thread and the UI object (ActiveX, NPAPI,
-//  ActiveDocument).
+//  background IPC-channel thread and the UI object (ActiveX, ActiveDocument).

[robertshield, 2011/06/28 20:49:35]

nit: *the background, also there is a parentheses mismatch.

[grt (UTC plus 2), 2011/06/28 20:57:38]

Done.

 //  The lifetime of ExternalTabProxy is determined by the UI object.
 //
 //  When ExternalTabProxy dies:
 //  1. Remove itself as a ChromeProxyDelegate. This blocks until _Disconnected()
 //     is received.
 //  2. Kills all posted tasks to the UI thread.
 //  3. Stop all network requests
 //  => It does not have to (and should not) be a refcount-ed object.
 
 // Non-public inheritance is not allowed by the style-guide.
@@ skipping 127 matching lines @@
     GURL url;
     GURL referrer;
     void Set(const GURL& gurl, const GURL& ref) {
       url = gurl;
       referrer = ref;
     }
   } pending_navigation_;
 };
 
 #endif  // CHROME_FRAME_EXTERNAL_TAB_H_