Move "oauth2" manifest key parsing out of Extension class.

chrome/common/extensions/extension_manifest_constants.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_COMMON_EXTENSIONS_EXTENSION_MANIFEST_CONSTANTS_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_MANIFEST_CONSTANTS_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 65 matching lines @@
   extern const char kLayouts[];
   extern const char kManifestVersion[];
   extern const char kMatches[];
   extern const char kMIMETypes[];
   extern const char kMinimumChromeVersion[];
   extern const char kNaClModules[];
   extern const char kNaClModulesMIMEType[];
   extern const char kNaClModulesPath[];
   extern const char kName[];
   extern const char kOAuth2[];
-  extern const char kOAuth2ClientId[];
-  extern const char kOAuth2Scopes[];
   extern const char kOfflineEnabled[];
   extern const char kOmnibox[];
   extern const char kOmniboxKeyword[];
   extern const char kOptionalPermissions[];
   extern const char kOptionsPage[];
   extern const char kPageAction[];
   extern const char kPageActionDefaultIcon[];
   extern const char kPageActionDefaultPopup[];
   extern const char kPageActionDefaultTitle[];
   extern const char kPageActionIcons[];
@@ skipping 254 matching lines @@
   extern const char kScriptBadgeRequiresFlag[];
   extern const char kScriptBadgeIconIgnored[];
   extern const char kScriptBadgeTitleIgnored[];
   extern const char kWebRequestConflictsWithLazyBackground[];
 #if defined(OS_CHROMEOS)
   extern const char kIllegalPlugins[];
 #endif
 }  // namespace extension_manifest_errors
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_MANIFEST_CONSTANTS_H_