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

chrome/common/extensions/api/identity/oauth2_manifest_handler.h

Index: chrome/common/extensions/api/identity/oauth2_manifest_handler.h
===================================================================
--- chrome/common/extensions/api/identity/oauth2_manifest_handler.h	(revision 0)
+++ chrome/common/extensions/api/identity/oauth2_manifest_handler.h	(revision 0)
@@ -0,0 +1,42 @@
+// 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.
+
+#ifndef CHROME_COMMON_EXTENSIONS_API_IDENTITY_OAUTH2_MANIFEST_HANDLER_H_
+#define CHROME_COMMON_EXTENSIONS_API_IDENTITY_OAUTH2_MANIFEST_HANDLER_H_
+
+#include <set>
+#include <string>
+#include <vector>
+
+#include "chrome/common/extensions/extension.h"
+#include "chrome/common/extensions/manifest_handler.h"
+
+namespace extensions {
+
+// OAuth2 info included in the extension.
+struct OAuth2Info : public Extension::ManifestData {
+  OAuth2Info();
+  virtual ~OAuth2Info();
+
+  std::string client_id;
+  std::vector<std::string> scopes;
+
+  static const OAuth2Info& GetOAuth2Info(const Extension* extension);
+};
+
+// Parses the "oauth2" manifest key.
+class OAuth2ManifestHandler : public ManifestHandler {
+ public:
+  OAuth2ManifestHandler();
+  virtual ~OAuth2ManifestHandler();
+
+  virtual bool Parse(Extension* extension,
+                     string16* error) OVERRIDE;
+ private:
+  DISALLOW_COPY_AND_ASSIGN(OAuth2ManifestHandler);
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_COMMON_EXTENSIONS_API_IDENTITY_OAUTH2_MANIFEST_HANDLER_H_