Fix bug where we fail to install an extension that has an empty

chrome/common/extensions/extension_constants.cc

 // Copyright (c) 2009 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/extension_constants.h"
 
 namespace extension_manifest_keys {
 
 const wchar_t* kBackground = L"background_page";
 const wchar_t* kChromeURLOverrides = L"chrome_url_overrides";
@@ skipping 82 matching lines @@
 const char* kInvalidPageActionsList =
     "Invalid value for 'page_actions'.";
 const char* kInvalidPageActionIconPaths =
     "Required value 'page_actions[*].icons' is missing or invalid.";
 const char* kInvalidPageActionId =
     "Required value 'id' is missing or invalid.";
 const char* kInvalidPageActionTypeValue =
     "Invalid value for 'page_actions[*].type', expected 'tab' or 'permanent'.";
 const char* kInvalidPermissions =
     "Required value 'permissions' is missing or invalid.";
-const char* kInvalidPermissionCountWarning =
-    "Warning, 'permissions' key found, but array is empty.";
 const char* kInvalidPermission =
     "Invalid value for 'permissions[*]'.";
 const char* kInvalidPermissionScheme =
     "Invalid scheme for 'permissions[*]'. Only 'http' and 'https' are "
     "allowed.";
 const char* kInvalidPlugins =
     "Invalid value for 'plugins'.";
 const char* kInvalidPluginsPath =
     "Invalid value for 'plugins[*].path'.";
 const char* kInvalidPluginsPublic =
@@ skipping 33 matching lines @@
     "Invalid value for update url: '[*]'.";
 const char* kInvalidDefaultLocale =
     "Invalid value for default locale - locale name must be a string.";
 const char* kThemesCannotContainExtensions =
     "A theme cannot contain extensions code.";
 const char* kLocalesNoDefaultLocaleSpecified =
     "Localization used, but default_locale wasn't specified in the manifest.";
 const char* kLocalesNoValidLocaleNamesListed =
     "No valid locale name could be found in _locales directory.";
 }  // namespace extension_manifest_errors