MD Bookmarks: Support policies for disabling bookmark editing

chrome/browser/ui/webui/md_bookmarks/md_bookmarks_browsertest.h

 // Copyright 2017 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_MD_BOOKMARKS_MD_BOOKMARKS_BROWSERTEST_H_
 #define CHROME_BROWSER_UI_WEBUI_MD_BOOKMARKS_MD_BOOKMARKS_BROWSERTEST_H_
 
 #include "chrome/test/base/web_ui_browser_test.h"
 #include "content/public/browser/web_ui_message_handler.h"
 
 class MdBookmarksBrowserTest : public WebUIBrowserTest,
                                public content::WebUIMessageHandler {
  public:
   MdBookmarksBrowserTest();
   ~MdBookmarksBrowserTest() override;
 
   void SetIncognitoAvailability(int availability);
+  void SetCanEditBookmarks(bool canEdit);
 
  private:
   void HandleSetIncognitoAvailability(const base::ListValue* args);
+  void HandleSetCanEditBookmarks(const base::ListValue* args);
 
   // content::WebUIMessageHandler:
   void RegisterMessages() override;
 
   // WebUIBrowserTest:
   content::WebUIMessageHandler* GetMockMessageHandler() override;
 
   DISALLOW_COPY_AND_ASSIGN(MdBookmarksBrowserTest);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_MD_BOOKMARKS_MD_BOOKMARKS_BROWSERTEST_H_