Move content's a plugin, ppapi_plugin, utility, and worker subdirectories to the content namespace.

content/utility/utility_main.cc

 // Copyright (c) 2011 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 "base/command_line.h"
 #include "base/hi_res_timer_manager.h"
 #include "base/message_loop.h"
 #include "base/system_monitor/system_monitor.h"
 #include "base/threading/platform_thread.h"
 #include "content/common/child_process.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/main_function_params.h"
 #include "content/public/common/sandbox_init.h"
 #include "content/utility/utility_thread_impl.h"
 
 #if defined(OS_WIN)
 #include "sandbox/win/src/sandbox.h"
 #endif
 
+namespace content {
+
 // Mainline routine for running as the utility process.
-int UtilityMain(const content::MainFunctionParams& parameters) {
+int UtilityMain(const MainFunctionParams& parameters) {
   // The main message loop of the utility process.
   MessageLoop main_message_loop;
   base::PlatformThread::SetName("CrUtilityMain");
 
   base::SystemMonitor system_monitor;
   HighResolutionTimerManager hi_res_timer_manager;
 
 #if defined(OS_LINUX)
   // Initialize the sandbox before any thread is created.
-  content::InitializeSandbox();
+  InitializeSandbox();
 #endif
 
   ChildProcess utility_process;
   utility_process.set_main_thread(new UtilityThreadImpl());
 
 #if defined(OS_WIN)
   bool no_sandbox = parameters.command_line.HasSwitch(switches::kNoSandbox);
   if (!no_sandbox) {
     sandbox::TargetServices* target_services =
         parameters.sandbox_info->target_services;
     if (!target_services)
       return false;
     target_services->LowerToken();
   }
 #endif
 
   MessageLoop::current()->Run();
 
   return 0;
 }
+
+}  // namespace content