Update print preview test to not use CallJavascriptFunctionUnsafe

chrome/browser/ui/webui/print_preview/print_preview_ui.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_ui.h"
 
 #include <map>
 #include <memory>
 #include <utility>
 #include <vector>
@@ skipping 677 matching lines @@
 }
 
 void PrintPreviewUI::SetSelectedFileForTesting(const base::FilePath& path) {
   handler_->FileSelected(path, 0, NULL);
 }
 
 void PrintPreviewUI::SetPdfSavedClosureForTesting(
     const base::Closure& closure) {
   handler_->SetPdfSavedClosureForTesting(closure);
 }
+
+void PrintPreviewUI::SendEnableManipulateSettingsForTest() {
+  handler_->SendEnableManipulateSettingsForTest();
+}
+
+void PrintPreviewUI::SendManipulateSettingsForTest(
+    const base::DictionaryValue& settings) {
+  handler_->SendManipulateSettingsForTest(settings);
+}