MD Settings: Add remapping options for Backspace and Escape

chrome/browser/extensions/api/settings_private/prefs_util.cc

Index: chrome/browser/extensions/api/settings_private/prefs_util.cc
diff --git a/chrome/browser/extensions/api/settings_private/prefs_util.cc b/chrome/browser/extensions/api/settings_private/prefs_util.cc
index db4e3889462497dc8060056eb33cb03c5aeeb3fe..dcc961d03744a3d4610fefb7c3dab13cc4626aad 100644
--- a/chrome/browser/extensions/api/settings_private/prefs_util.cc
+++ b/chrome/browser/extensions/api/settings_private/prefs_util.cc
@@ -293,6 +293,10 @@ const PrefsUtil::TypedPrefMap& PrefsUtil::GetWhitelistedKeys() {
       settings_private::PrefType::PREF_TYPE_NUMBER;
   (*s_whitelist)["settings.language.remap_caps_lock_key_to"] =
       settings_private::PrefType::PREF_TYPE_NUMBER;
+  (*s_whitelist)["settings.language.remap_backspace_key_to"] =
+      settings_private::PrefType::PREF_TYPE_NUMBER;
+  (*s_whitelist)["settings.language.remap_escape_key_to"] =
+      settings_private::PrefType::PREF_TYPE_NUMBER;
   (*s_whitelist)["settings.language.remap_diamond_key_to"] =
       settings_private::PrefType::PREF_TYPE_NUMBER;
   (*s_whitelist)["settings.language.send_function_keys"] =