Reland of ExtensionFunction: don't pass ownership of base::Value by raw pointer.

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 "base/guid.h"
+#include "base/memory/ptr_util.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/storage_partition.h"
 #include "extensions/common/manifest_handlers/oauth2_manifest_handler.h"
 #include "extensions/shell/browser/shell_oauth2_token_service.h"
 #include "extensions/shell/common/api/identity.h"
 #include "google_apis/gaia/gaia_auth_util.h"
 
 namespace extensions {
 namespace shell {
 
@@ skipping 98 matching lines @@
 void IdentityGetAuthTokenFunction::OnGetTokenFailure(
     const OAuth2TokenService::Request* request,
     const GoogleServiceAuthError& error) {
   Respond(Error(error.ToString()));
   Release();  // Balanced in Run().
 }
 
 void IdentityGetAuthTokenFunction::OnMintTokenSuccess(
     const std::string& access_token,
     int time_to_live) {
-  Respond(OneArgument(new base::StringValue(access_token)));
+  Respond(OneArgument(base::MakeUnique<base::StringValue>(access_token)));
   Release();  // Balanced in Run().
 }
 
 void IdentityGetAuthTokenFunction::OnIssueAdviceSuccess(
     const IssueAdviceInfo& issue_advice) {
   Respond(Error(kErrorUserPermissionRequired));
   Release();  // Balanced in Run().
 }
 
 void IdentityGetAuthTokenFunction::OnMintTokenFailure(
@@ skipping 15 matching lines @@
   std::unique_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