Print Preview: change getPreview to cr.sendWithPromise

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

Index: chrome/browser/ui/webui/print_preview/print_preview_ui.h
diff --git a/chrome/browser/ui/webui/print_preview/print_preview_ui.h b/chrome/browser/ui/webui/print_preview/print_preview_ui.h
index 2abe24e64a1dc61ee0ac4e134509471ad12fe53e..19756a38aefa3c789372f64fb4dd595881359cca 100644
--- a/chrome/browser/ui/webui/print_preview/print_preview_ui.h
+++ b/chrome/browser/ui/webui/print_preview/print_preview_ui.h
@@ -109,7 +109,7 @@ class PrintPreviewUI : public ConstrainedWebDialogUI {
                                 int preview_request_id);
 
   // Notifies the Web UI that the print preview failed to render.
-  void OnPrintPreviewFailed();
+  void OnPrintPreviewFailed(int request_id);
 
   // Notified the Web UI that this print preview dialog's RenderProcess has been
   // closed, which may occur for several reasons, e.g. tab closure or crash.
@@ -121,7 +121,7 @@ class PrintPreviewUI : public ConstrainedWebDialogUI {
 
   // Notifies the Web UI that the printer is unavailable or its settings are
   // invalid.
-  void OnInvalidPrinterSettings();
+  void OnInvalidPrinterSettings(int request_id);
 
   // Notifies the Web UI to cancel the pending preview request.
   void OnCancelPendingPreviewRequest();