For Linux, create a ZygoteForkDelegate that uses the nacl_helper executable

chrome/app/chrome_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 "chrome/app/chrome_main.h"
 
 #include "base/at_exit.h"
 #include "base/command_line.h"
 #include "base/debug/debugger.h"
 #include "base/i18n/icu_util.h"
@@ skipping 59 matching lines @@
 #include "third_party/WebKit/Source/WebKit/mac/WebCoreSupport/WebSystemInterface.h"
 #include "ui/base/l10n/l10n_util_mac.h"
 #endif
 
 #if defined(OS_POSIX)
 #include <locale.h>
 #include <signal.h>
 #endif
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
+#include "chrome/common/nacl_fork_delegate_linux.h"
 #include "content/common/zygote_fork_delegate_linux.h"
 #endif
 
 #if defined(OS_CHROMEOS)
 #include "base/sys_info.h"
 #include "chrome/browser/chromeos/boot_times_loader.h"
 #endif
 
 #if defined(USE_X11)
 #include <gdk/gdk.h>
@@ skipping 362 matching lines @@
   };
 
   // Each Renderer we spawn will re-attempt initialization of the media
   // libraries, at which point failure will be detected and handled, so
   // we do not need to cope with initialization failures here.
   FilePath media_path;
   if (PathService::Get(chrome::DIR_MEDIA_LIBS, &media_path))
     media::InitializeMediaLibrary(media_path);
 
   // This function call can return multiple times, once per fork().
-  if (!ZygoteMain(main_function_params, NULL))
+  NaClForkDelegate* nacl_delegate = new NaClForkDelegate();
+  int rval = ZygoteMain(main_function_params, nacl_delegate);
+  if (nacl_delegate)
+    delete nacl_delegate;
+  if (!rval)
     return 1;
 
   // Zygote::HandleForkRequest may have reallocated the command
   // line so update it here with the new version.
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
 
   // The StatsTable must be initialized in each process; we already
   // initialized for the browser process, now we need to initialize
   // within the new processes as well.
   pid_t browser_pid = base::GetParentProcessId(
@@ skipping 399 matching lines @@
 
   if (SubprocessNeedsResourceBundle(process_type))
     ResourceBundle::CleanupSharedInstance();
 
   logging::CleanupChromeLogging();
 
   chrome_main::LowLevelShutdown();
 
   return exit_code;
 }