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

chrome/browser/about_flags.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/about_flags.h"
 
 #include <iterator>
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 1551 matching lines @@
   },
 #endif
 #if defined(TOOLKIT_VIEWS)
   {
     "disable-views-rect-based-targeting",  // FLAGS:RECORD_UMA
     IDS_FLAGS_DISABLE_VIEWS_RECT_BASED_TARGETING_NAME,
     IDS_FLAGS_DISABLE_VIEWS_RECT_BASED_TARGETING_DESCRIPTION,
     kOsCrOS | kOsWin | kOsLinux,
     SINGLE_VALUE_TYPE(views::switches::kDisableViewsRectBasedTargeting)
   },
+  {
+    "disable-link-disambiguation-popup",
+    IDS_FLAGS_DISABLE_LINK_DISAMBIGUATION_POPUP_NAME,
+    IDS_FLAGS_DISABLE_LINK_DISAMBIGUATION_POPUP_DESCRIPTION,
+    kOsCrOS | kOsWin,
+    SINGLE_VALUE_TYPE(switches::kDisableLinkDisambiguationPopup)
+  },
 #endif
 #if defined(ENABLE_EXTENSIONS)
   {
     "enable-apps-show-on-first-paint",
     IDS_FLAGS_ENABLE_APPS_SHOW_ON_FIRST_PAINT_NAME,
     IDS_FLAGS_ENABLE_APPS_SHOW_ON_FIRST_PAINT_DESCRIPTION,
     kOsDesktop,
     SINGLE_VALUE_TYPE(extensions::switches::kEnableAppsShowOnFirstPaint)
   },
 #endif
@@ skipping 935 matching lines @@
 }
 
 const Experiment* GetExperiments(size_t* count) {
   *count = num_experiments;
   return experiments;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags