app_shell: Extend identity API stub

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

 // 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.
 
 #include "extensions/shell/browser/api/identity/identity_api.h"
 
 #include <set>
 #include <string>
 
 #include "extensions/common/manifest_handlers/oauth2_manifest_handler.h"
@@ skipping 54 matching lines @@
   Release();  // Balanced in Run().
 }
 
 void IdentityGetAuthTokenFunction::OnGetTokenFailure(
     const OAuth2TokenService::Request* request,
     const GoogleServiceAuthError& error) {
   Respond(Error(error.ToString()));
   Release();  // Balanced in Run().
 }
 
+///////////////////////////////////////////////////////////////////////////////
+
+IdentityRemoveCachedAuthTokenFunction::IdentityRemoveCachedAuthTokenFunction() {
+}
+
+IdentityRemoveCachedAuthTokenFunction::
+    ~IdentityRemoveCachedAuthTokenFunction() {
+}
+
+ExtensionFunction::ResponseAction IdentityRemoveCachedAuthTokenFunction::Run() {
+  scoped_ptr<api::identity::RemoveCachedAuthToken::Params> params(
+      api::identity::RemoveCachedAuthToken::Params::Create(*args_));
+  EXTENSION_FUNCTION_VALIDATE(params.get());
+  // This stub identity API does not maintain a token cache, so there is nothing
+  // to remove.
+  return RespondNow(NoArguments());
+}
+
 }  // namespace shell
 }  // namespace extensions