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

ui/base/ui_base_switches_util.cc

 // Copyright (c) 2013 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 "ui/base/ui_base_switches_util.h"
 
 #include "base/command_line.h"
 #include "ui/base/ui_base_switches.h"
 
 namespace switches {
 
+bool IsLinkDisambiguationPopupEnabled() {
+  if (CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kDisableLinkDisambiguationPopup)) {
+    return false;
+  }
+#if defined(OS_WIN) || defined(OS_ANDROID)
+  return true;
+#else
+  return false;
+#endif
+}
+
 bool IsTextInputFocusManagerEnabled() {
   return CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kEnableTextInputFocusManager);
 }
 
 bool IsTouchDragDropEnabled() {
 #if defined(OS_CHROMEOS)
   return !CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kDisableTouchDragDrop);
 #else
   return CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kEnableTouchDragDrop);
 #endif
 }
 
 bool IsTouchEditingEnabled() {
 #if defined(USE_AURA)
   return !CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kDisableTouchEditing);
 #else
   return CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kEnableTouchEditing);
 #endif
 }
 
 }  // namespace switches