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

chrome/common/extensions/extension_manifest_constants.cc

 // 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.
 
 #include "chrome/common/extensions/extension_manifest_constants.h"
 
 namespace extension_manifest_keys {
 
 const char kAllFrames[] = "all_frames";
 const char kAltKey[] = "altKey";
@@ skipping 58 matching lines @@
 const char kLayouts[] = "layouts";
 const char kManifestVersion[] = "manifest_version";
 const char kMatches[] = "matches";
 const char kMinimumChromeVersion[] = "minimum_chrome_version";
 const char kMIMETypes[] = "mime_types";
 const char kName[] = "name";
 const char kNaClModules[] = "nacl_modules";
 const char kNaClModulesMIMEType[] = "mime_type";
 const char kNaClModulesPath[] = "path";
 const char kOAuth2[] = "oauth2";
-const char kOAuth2ClientId[] = "oauth2.client_id";
-const char kOAuth2Scopes[] = "oauth2.scopes";
 const char kOfflineEnabled[] = "offline_enabled";
 const char kOmnibox[] = "omnibox";
 const char kOmniboxKeyword[] = "omnibox.keyword";
 const char kOptionalPermissions[] = "optional_permissions";
 const char kOptionsPage[] = "options_page";
 const char kPageAction[] = "page_action";
 const char kPageActionDefaultIcon[] = "default_icon";
 const char kPageActionDefaultPopup[] = "default_popup";
 const char kPageActionDefaultTitle[] = "default_title";
 const char kPageActionIcons[] = "icons";
@@ skipping 455 matching lines @@
 const char kScriptBadgeTitleIgnored[] =
     "default_title specified in script_badge manifest section will not be "
     "used.";
 const char kWebRequestConflictsWithLazyBackground[] =
     "The 'webRequest' API cannot be used with event pages.";
 #if defined(OS_CHROMEOS)
 const char kIllegalPlugins[] =
     "Extensions cannot install plugins on Chrome OS";
 #endif
 }  // namespace extension_manifest_errors