Remove bad CallJavascriptFunctionUnsafe call from PrintPreviewUI

chrome/browser/ui/webui/print_preview/print_preview_handler.h

Index: chrome/browser/ui/webui/print_preview/print_preview_handler.h
diff --git a/chrome/browser/ui/webui/print_preview/print_preview_handler.h b/chrome/browser/ui/webui/print_preview/print_preview_handler.h
index 5b55691f6a62d13f2011f4e8c64886dd3e7d1c16..44c0125a3d394325a2a7957e3a8ce6d63705ff25 100644
--- a/chrome/browser/ui/webui/print_preview/print_preview_handler.h
+++ b/chrome/browser/ui/webui/print_preview/print_preview_handler.h
@@ -86,6 +86,9 @@ class PrintPreviewHandler
   // Called when print preview is ready.
   void OnPrintPreviewReady(int preview_uid, int request_id);
 
+  // Called when a print request is cancelled due to its initiator closing.
+  void OnPrintRequestCancelled();
+
   // Send the print preset options from the document.
   void SendPrintPresetOptions(bool disable_scaling, int copies, int duplex);