Clean up Linux zygote creation code

content/browser/utility_process_host_impl.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 "content/browser/utility_process_host_impl.h"
 
 #include <utility>
 
 #include "base/base_switches.h"
 #include "base/bind.h"
@@ skipping 82 matching lines @@
     base::FilePath exposed_files = exposed_dir_.AppendASCII("*");
     result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_FILES,
                              sandbox::TargetPolicy::FILES_ALLOW_ANY,
                              exposed_files.value().c_str());
     return result == sandbox::SBOX_ALL_OK;
   }
 
 #elif defined(OS_POSIX)
 
 #if !defined(OS_MACOSX) && !defined(OS_ANDROID)
-  ZygoteHandle* GetZygote() override {
+  ZygoteHandle GetZygote() override {
     if (no_sandbox_ || !exposed_dir_.empty())
       return nullptr;
     return GetGenericZygote();
   }
 #endif  // !defined(OS_MACOSX) && !defined(OS_ANDROID)
   base::EnvironmentMap GetEnvironment() override { return env_; }
 #endif  // OS_WIN
 
   SandboxType GetSandboxType() override {
     return SANDBOX_TYPE_UTILITY;
@@ skipping 275 matching lines @@
     base::WeakPtr<UtilityProcessHostImpl> host,
     int error_code) {
   if (!host)
     return;
 
   host->OnProcessLaunchFailed(error_code);
   delete host.get();
 }
 
 }  // namespace content