Update print preview test to not use CallJavascriptFunctionUnsafe

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

 // 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_UI_H_
 
 #include <stdint.h>
 
 #include <string>
 
 #include "base/callback_forward.h"
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/time/time.h"
 #include "chrome/browser/ui/webui/constrained_web_dialog_ui.h"
 #include "printing/features/features.h"
 
 class PrintPreviewHandler;
 struct PrintHostMsg_DidGetPreviewPageCount_Params;
 struct PrintHostMsg_RequestPrintPreview_Params;
 struct PrintHostMsg_SetOptionsFromDocument_Params;
 
 namespace base {
+class DictionaryValue;
 class FilePath;
 class RefCountedBytes;
 }
 
 namespace gfx {
 class Rect;
 }
 
 namespace printing {
 struct PageSizeMargins;
@@ skipping 115 matching lines @@
 
   static void SetDelegateForTesting(TestingDelegate* delegate);
 
   // Allows for tests to set a file path to print a PDF to. This also initiates
   // the printing without having to click a button on the print preview dialog.
   void SetSelectedFileForTesting(const base::FilePath& path);
 
   // Passes |closure| to PrintPreviewHandler::SetPdfSavedClosureForTesting().
   void SetPdfSavedClosureForTesting(const base::Closure& closure);
 
+  // Tell the handler to send the enable-manipulate-settings-for-test WebUI
+  // event.
+  void SendEnableManipulateSettingsForTest();
+
+  // Tell the handler to send the manipulate-settings-for-test WebUI event
+  // to set the print preview settings contained in |settings|.
+  void SendManipulateSettingsForTest(const base::DictionaryValue& settings);
+
  private:
   FRIEND_TEST_ALL_PREFIXES(PrintPreviewDialogControllerUnitTest,
                            TitleAfterReload);
 
   base::TimeTicks initial_preview_start_time_;
 
   // The unique ID for this class instance. Stored here to avoid calling
   // GetIDForPrintPreviewUI() everywhere.
   const int32_t id_;
 
@@ skipping 13 matching lines @@
   // title.
   base::string16 initiator_title_;
 
   // Keeps track of whether OnClosePrintPreviewDialog() has been called or not.
   bool dialog_closed_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintPreviewUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_UI_H_