Remove bad CallJavascriptFunctionUnsafe call from PrintPreviewUI

chrome/browser/ui/webui/print_preview/print_preview_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/ui/webui/print_preview/print_preview_handler.h"
 
 #include <ctype.h>
 #include <stddef.h>
 
 #include <map>
@@ skipping 1576 matching lines @@
                     base::Value(preview_uid), base::Value(preview_response_id));
 }
 
 void PrintPreviewHandler::OnPrintPreviewCancelled() {
   CHECK(!preview_callbacks_.empty());
   RejectJavascriptCallback(base::Value(preview_callbacks_.front()),
                            base::Value("CANCELLED"));
   preview_callbacks_.pop();
 }
 
+void PrintPreviewHandler::OnPrintRequestCancelled() {
+  HandleCancelPendingPrintRequest(nullptr);
+}
+
 #if BUILDFLAG(ENABLE_BASIC_PRINT_DIALOG)
 void PrintPreviewHandler::ShowSystemDialog() {
   HandleShowSystemDialog(NULL);
 }
 #endif
 
 void PrintPreviewHandler::FileSelected(const base::FilePath& path,
                                        int /* index */,
                                        void* /* params */) {
   // Update downloads location and save sticky settings.
@@ skipping 345 matching lines @@
 
 void PrintPreviewHandler::UnregisterForGaiaCookieChanges() {
   if (gaia_cookie_manager_service_)
     gaia_cookie_manager_service_->RemoveObserver(this);
 }
 
 void PrintPreviewHandler::SetPdfSavedClosureForTesting(
     const base::Closure& closure) {
   pdf_file_saved_closure_ = closure;
 }