Reland 56669: Initial change that allows to disable bookmarks

chrome/browser/defaults.h

 // Copyright (c) 2010 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.
 
 // Defines various defaults whose values varies depending upon the OS.
 
 #ifndef CHROME_BROWSER_DEFAULTS_H_
 #define CHROME_BROWSER_DEFAULTS_H_
 #pragma once
 
@@ skipping 56 matching lines @@
 
 // Should other browsers be shown in about:memory page?
 extern const bool kShowOtherBrowsersInAboutMemory;
 
 // Should always open incognito windows when started with --incognito switch?
 extern const bool kAlwaysOpenIncognitoWindow;
 
 // Are phantom tabs enabled?
 extern const bool kPhantomTabsEnabled;
 
+//=============================================================================
+// Runtime "const" - set only once after parsing command line option and should
+// never be modified after that.
+
+// Are bookmark enabled? True by default.
+extern bool bookmarks_enabled;
+
 }  // namespace browser_defaults
 
 #endif  // CHROME_BROWSER_DEFAULTS_H_