Add the IDL and stub implementation for the chrome.autofillPrivate API.

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 "chrome/grit/generated_resources.h"
 #include "extensions/common/permissions/api_permission.h"
 #include "extensions/common/permissions/api_permission_set.h"
 #include "extensions/common/permissions/media_galleries_permission.h"
@@ skipping 322 matching lines @@
        "principalsPrivate",
        APIPermissionInfo::kFlagCannotBeOptional},
       {APIPermission::kFirstRunPrivate,
        "firstRunPrivate",
        APIPermissionInfo::kFlagCannotBeOptional},
       {APIPermission::kInlineInstallPrivate, "inlineInstallPrivate"},
       {APIPermission::kSettingsPrivate,
        "settingsPrivate",
        APIPermissionInfo::kFlagCannotBeOptional,
        IDS_EXTENSION_PROMPT_WARNING_SETTINGS_PRIVATE,
-       PermissionMessage::kSettingsPrivate},
+       PermissionMessage::kAutofillPrivate},
+      {APIPermission::kAutofillPrivate,
+       "autofillPrivate",
+       APIPermissionInfo::kFlagCannotBeOptional,

[not at google - send to devlin, 2015/04/23 19:35:52]

I wonder why there are so many permissions in this file that can't be optional,
and so I filed crbug.com/480576 for that. In this case I don't see any harm in
it being optional.

[Kyle Horimoto, 2015/04/23 20:23:31]

Shouldn't it be non-optional? Without the permission, the settings page would
not be fully functional.

+       IDS_EXTENSION_PROMPT_WARNING_AUTOFILL_PRIVATE,
+       PermissionMessage::kAutofillPrivate},
 
       // Full url access permissions.
       {APIPermission::kDebugger,
        "debugger",
        APIPermissionInfo::kFlagImpliesFullURLAccess |
            APIPermissionInfo::kFlagCannotBeOptional,
        IDS_EXTENSION_PROMPT_WARNING_DEBUGGER,
        PermissionMessage::kDebugger},
       {APIPermission::kDevtools,
        "devtools",
@@ skipping 96 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