Implement the private API for quick unlock.

chrome/common/extensions/permissions/chrome_api_permissions.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 "chrome/common/extensions/permissions/chrome_api_permissions.h"
 
 #include <stddef.h>
 
 #include "base/macros.h"
 #include "chrome/grit/generated_resources.h"
@@ skipping 181 matching lines @@
       {APIPermission::kWebstoreWidgetPrivate, "webstoreWidgetPrivate",
        APIPermissionInfo::kFlagCannotBeOptional},
       {APIPermission::kPasswordsPrivate, "passwordsPrivate",
        APIPermissionInfo::kFlagCannotBeOptional},
       {APIPermission::kUsersPrivate, "usersPrivate",
        APIPermissionInfo::kFlagCannotBeOptional},
       {APIPermission::kLanguageSettingsPrivate, "languageSettingsPrivate",
        APIPermissionInfo::kFlagCannotBeOptional},
       {APIPermission::kResourcesPrivate, "resourcesPrivate",
        APIPermissionInfo::kFlagCannotBeOptional},
+      {APIPermission::kQuickUnlockPrivate, "quickUnlockPrivate",
+       APIPermissionInfo::kFlagCannotBeOptional},

[Devlin, 2016/05/31 22:58:38]

Why can't it be optional?

[jdufault, 2016/06/01 00:07:36]

Changed to kFlagNone. I don't have a strong opinion here, but every consumer
needs the permission to perform any functionality w.r.t. quick unlock, so it
doesn't make sense for it to be optional.

[Devlin, 2016/06/01 17:44:12]

Well, it does in the case of an app/extension that does more than just quick
unlock.  CannotBeOptional should be used rarely, because optional permissions
are far preferable if it's feasible.  The extension can always make the choice
to still have it be a required permission if it's core to its functionality. 
(Of course, not as big a deal here, since it's a private API.)

 
       // Full url access permissions.
       {APIPermission::kDebugger, "debugger",
        APIPermissionInfo::kFlagImpliesFullURLAccess |
            APIPermissionInfo::kFlagCannotBeOptional},
       {APIPermission::kDevtools, "devtools",
        APIPermissionInfo::kFlagImpliesFullURLAccess |
            APIPermissionInfo::kFlagCannotBeOptional |
            APIPermissionInfo::kFlagInternal},
       {APIPermission::kPageCapture, "pageCapture",
@@ skipping 57 matching lines @@
 
 std::vector<PermissionsProvider::AliasInfo>
 ChromeAPIPermissions::GetAllAliases() const {
   // Register aliases.
   std::vector<PermissionsProvider::AliasInfo> aliases;
   aliases.push_back(PermissionsProvider::AliasInfo("tabs", kWindowsPermission));
   return aliases;
 }
 
 }  // namespace extensions