app_shell: Extend identity API stub

extensions/shell/browser/api/identity/identity_api.h

 // Copyright 2014 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 EXTENSIONS_SHELL_BROWSER_API_IDENTITY_IDENTITY_API_H_
 #define EXTENSIONS_SHELL_BROWSER_API_IDENTITY_IDENTITY_API_H_
 
 #include "base/macros.h"
 #include "extensions/browser/extension_function.h"
 #include "google_apis/gaia/oauth2_token_service.h"
@@ skipping 23 matching lines @@
   void OnGetTokenFailure(const OAuth2TokenService::Request* request,
                          const GoogleServiceAuthError& error) override;
 
  private:
   // A pending token fetch request.
   scoped_ptr<OAuth2TokenService::Request> access_token_request_;
 
   DISALLOW_COPY_AND_ASSIGN(IdentityGetAuthTokenFunction);
 };
 
+// Stub. See the IDL file for documentation.
+class IdentityRemoveCachedAuthTokenFunction : public UIThreadExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION("identity.removeCachedAuthToken", UNKNOWN)
+
+  IdentityRemoveCachedAuthTokenFunction();
+
+ protected:
+  ~IdentityRemoveCachedAuthTokenFunction() override;
+
+  // ExtensionFunction:
+  ResponseAction Run() override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(IdentityRemoveCachedAuthTokenFunction);
+};
+
 }  // namespace shell
 }  // namespace extensions
 
 #endif  // EXTENSIONS_SHELL_BROWSER_API_IDENTITY_IDENTITY_API_H_