Fix issue 174250, crash when reloading packaged app.

chrome/browser/ui/extensions/shell_window.h

Index: chrome/browser/ui/extensions/shell_window.h
diff --git a/chrome/browser/ui/extensions/shell_window.h b/chrome/browser/ui/extensions/shell_window.h
index a996ed3b2c46c2d5b182a17aed3b0b8bc35e24a5..ee6e23432f076cc2845e3baf736ab5ad7d69c15b 100644
--- a/chrome/browser/ui/extensions/shell_window.h
+++ b/chrome/browser/ui/extensions/shell_window.h
@@ -133,6 +133,11 @@ class ShellWindow : public content::NotificationObserver,
   // per platform). Public users of ShellWindow should use ShellWindow::Create.
   void Init(const GURL& url, const CreateParams& params);
 
+  // Remove the window from the ShellWindowRegistry and tell the native
+  // window to close. The native window won't be actually closed until
+  // OnNativeClose().
+  void Close();
+
   // content::WebContentsObserver implementation.
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;