If we're in the middle of printing when window.close() is called, then defer closing the window until printing completes. This avoids tearing down the presentation while the print engine is still using it. Bug 172921, r=jkeiser, sr=dbaron.

git-svn-id: svn://10.0.0.236/trunk@147348 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/docshell/base/nsIContentViewer.idl

@@ -59,4 +59,12 @@ interface nsIContentViewer : nsISupports
   attribute boolean enableRendering;
 
   attribute boolean sticky;
+
+  /*
+   * This is called when the DOM window wants to be closed.  Returns true
+   * if the window can close immediately.  Otherwise, returns false and will
+   * close the DOM window as soon as practical.
+   */
+
+  boolean requestWindowClose();
 };