Adding pref to store the user-selected proximity threshold.

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

 // Copyright 2015 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/extensions/api/settings_private/prefs_util.h"
 
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/chrome_extension_function.h"
 #include "chrome/browser/extensions/settings_api_helpers.h"
@@ skipping 208 matching lines @@
   (*s_whitelist)[chromeos::kAccountsPrefShowUserNamesOnSignIn] =
       settings_private::PrefType::PREF_TYPE_BOOLEAN;
   (*s_whitelist)[chromeos::kAccountsPrefAllowNewUser] =
       settings_private::PrefType::PREF_TYPE_BOOLEAN;
   (*s_whitelist)[chromeos::kAccountsPrefUsers] =
       settings_private::PrefType::PREF_TYPE_LIST;
   (*s_whitelist)[::prefs::kEnableAutoScreenLock] =
       settings_private::PrefType::PREF_TYPE_BOOLEAN;
   (*s_whitelist)[::prefs::kEnableQuickUnlockFingerprint] =
       settings_private::PrefType::PREF_TYPE_BOOLEAN;
+  (*s_whitelist)[::prefs::kEasyUnlockProximityThreshold] =
+      settings_private::PrefType::PREF_TYPE_NUMBER;
 
   // Accessibility.
   (*s_whitelist)[::prefs::kAccessibilitySpokenFeedbackEnabled] =
       settings_private::PrefType::PREF_TYPE_BOOLEAN;
   (*s_whitelist)[::prefs::kAccessibilityAutoclickEnabled] =
       settings_private::PrefType::PREF_TYPE_BOOLEAN;
   (*s_whitelist)[::prefs::kAccessibilityAutoclickDelayMs] =
       settings_private::PrefType::PREF_TYPE_BOOLEAN;
   (*s_whitelist)[::prefs::kAccessibilityCaretHighlightEnabled] =
       settings_private::PrefType::PREF_TYPE_BOOLEAN;
@@ skipping 550 matching lines @@
       ExtensionPrefValueMapFactory::GetForBrowserContext(profile_)
           ->GetExtensionControllingPref(pref_object.key);
   if (extension_id.empty())
     return nullptr;
 
   return ExtensionRegistry::Get(profile_)->GetExtensionById(
       extension_id, ExtensionRegistry::ENABLED);
 }
 
 }  // namespace extensions