Print Preview: change getPreview to cr.sendWithPromise

chrome/browser/printing/print_preview_message_handler.cc

Index: chrome/browser/printing/print_preview_message_handler.cc
diff --git a/chrome/browser/printing/print_preview_message_handler.cc b/chrome/browser/printing/print_preview_message_handler.cc
index 89cc4977ce55084e3bcb7b912c5ce9b230723f15..ae2ff22c74b9de34136a4e72c64221b946fb4d9f 100644
--- a/chrome/browser/printing/print_preview_message_handler.cc
+++ b/chrome/browser/printing/print_preview_message_handler.cc
@@ -190,6 +190,12 @@ void PrintPreviewMessageHandler::OnDidGetDefaultPageLayout(
 void PrintPreviewMessageHandler::OnPrintPreviewCancelled(int document_cookie) {
   // Always need to stop the worker.
   StopWorker(document_cookie);
+
+  // Notify UI
+  PrintPreviewUI* print_preview_ui = GetPrintPreviewUI();
+  if (!print_preview_ui)
+    return;
+  print_preview_ui->OnPrintPreviewCancelled();
 }
 
 void PrintPreviewMessageHandler::OnInvalidPrinterSettings(int document_cookie) {