Clean up Linux zygote creation code

content/browser/renderer_host/render_process_host_impl.cc

 // Copyright 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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #include <algorithm>
@@ skipping 385 matching lines @@
     const base::string16& sid =
         GetContentClient()->browser()->GetAppContainerSidForSandboxType(
             GetSandboxType());
     if (!sid.empty())
       AddAppContainerPolicy(policy, sid.c_str());
 
     return GetContentClient()->browser()->PreSpawnRenderer(policy);
   }
 
 #elif defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
-  ZygoteHandle* GetZygote() override {
+  ZygoteHandle GetZygote() override {
     const base::CommandLine& browser_command_line =
         *base::CommandLine::ForCurrentProcess();
     base::CommandLine::StringType renderer_prefix =
         browser_command_line.GetSwitchValueNative(switches::kRendererCmdPrefix);
     if (!renderer_prefix.empty())
       return nullptr;
     return GetGenericZygote();
   }
 #endif  // OS_WIN
 
@@ skipping 2704 matching lines @@
   LOG(ERROR) << "Terminating render process for bad Mojo message: " << error;
 
   // The ReceivedBadMessage call below will trigger a DumpWithoutCrashing.
   // Capture the error message in a crash key value.
   base::debug::ScopedCrashKey error_key_value("mojo-message-error", error);
   bad_message::ReceivedBadMessage(render_process_id,
                                   bad_message::RPH_MOJO_PROCESS_ERROR);
 }
 
 }  // namespace content