add flag to disable link disambiguation popup

ui/base/ui_base_switches.cc

Index: ui/base/ui_base_switches.cc
diff --git a/ui/base/ui_base_switches.cc b/ui/base/ui_base_switches.cc
index 2163397ccf39355a53f63dbc85f30cff5fcce4fa..8d518eaa881067f36667eb7e38a445671dbc5f1c 100644
--- a/ui/base/ui_base_switches.cc
+++ b/ui/base/ui_base_switches.cc
@@ -15,6 +15,9 @@ const char kDisableRemoteCoreAnimation[] = "disable-remote-core-animation";
 // Disables use of DWM composition for top level windows.
 const char kDisableDwmComposition[] = "disable-dwm-composition";
 
+const char kDisableLinkDisambiguationPopup[] =
+    "disable-link-disambiguation-popup";
+
 // Disables an experimental focus manager to track text input clients.
 const char kDisableTextInputFocusManager[] = "disable-text-input-focus-manager";