We previously had a setting in chrome defaults but this deprecates that for a command line flag and…

chrome/browser/defaults.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.
 
 // Defines various defaults whose values varies depending upon the OS.
 
 #ifndef CHROME_BROWSER_DEFAULTS_H_
 #define CHROME_BROWSER_DEFAULTS_H_
 
 #include "build/build_config.h"
@@ skipping 15 matching lines @@
 // Width of mini-tabs.  Inline because other constants are computed depending
 // on this, which causes static initializers if the value isn't available in
 // all translation units that do this.
 #if defined(TOOLKIT_VIEWS)
 // Windows and Chrome OS have bigger shadows in the tab art.
 const int kMiniTabWidth = 64;
 #else
 const int kMiniTabWidth = 56;
 #endif
 
-#if defined(TOOLKIT_VIEWS)
-// Whether to show a Link Disambiguation Popup Bubble if the browser detects an
-// ambiguous touch event.
-extern const bool kShowLinkDisambiguationPopup;
-#endif
-
 // Can the browser be alive without any browser windows?
 extern const bool kBrowserAliveWithNoWindows;
 
 // Whether various menu items are shown.
 extern const bool kShowExitMenuItem;
 extern const bool kShowHelpMenuItemIcon;
 extern const bool kShowUpgradeMenuItem;
 
 // Should a link be shown on the bookmark bar allowing the user to import
 // bookmarks?
@@ skipping 38 matching lines @@
 // Are bookmark enabled? True by default.
 extern bool bookmarks_enabled;
 
 // Whether HelpApp is enabled. True by default. This is only used by Chrome OS
 // today.
 extern bool enable_help_app;
 
 }  // namespace browser_defaults
 
 #endif  // CHROME_BROWSER_DEFAULTS_H_