Pull seccomp-sandbox in via DEPS rather than using an in-tree copy...

chrome/renderer/renderer_main_platform_delegate_linux.cc

 // Copyright (c) 2009 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/renderer/renderer_main_platform_delegate.h"
 
 #include "base/command_line.h"
 #include "base/debug_util.h"
-#include "sandbox/linux/seccomp/sandbox.h"
+#include "seccompsandbox/sandbox.h"
 
 #include "chrome/common/chrome_switches.h"
 
 RendererMainPlatformDelegate::RendererMainPlatformDelegate(
     const MainFunctionParams& parameters)
         : parameters_(parameters) {
 }
 
 RendererMainPlatformDelegate::~RendererMainPlatformDelegate() {
 }
@@ skipping 23 matching lines @@
   if (switches::SeccompSandboxEnabled() && SupportsSeccompSandbox(-1))
     StartSeccompSandbox();
 #endif
   return true;
 }
 
 void RendererMainPlatformDelegate::RunSandboxTests() {
   // The sandbox is started in the zygote process: zygote_main_linux.cc
   // http://code.google.com/p/chromium/wiki/LinuxSUIDSandbox
 }