Print Preview: change getPreview to cr.sendWithPromise

chrome/browser/printing/print_preview_message_handler.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/printing/print_preview_message_handler.h"
 
 #include <stdint.h>
 
 #include <memory>
 #include <utility>
@@ skipping 172 matching lines @@
   if (!print_preview_ui)
     return;
   print_preview_ui->OnDidGetDefaultPageLayout(page_layout_in_points,
                                               printable_area_in_points,
                                               has_custom_page_size_style);
 }
 
 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) {
   StopWorker(document_cookie);
   PrintPreviewUI* print_preview_ui = GetPrintPreviewUI();
   if (!print_preview_ui)
     return;
   print_preview_ui->OnInvalidPrinterSettings();
 }
 
@@ skipping 34 matching lines @@
     IPC_MESSAGE_HANDLER(PrintHostMsg_PrintPreviewInvalidPrinterSettings,
                         OnInvalidPrinterSettings)
     IPC_MESSAGE_HANDLER(PrintHostMsg_SetOptionsFromDocument,
                         OnSetOptionsFromDocument)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 }  // namespace printing