Use a valid /prefetch argument when launching a process.

content/common/sandbox_win.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/common/sandbox_win.h"
 
 #include <stddef.h>
 
 #include <string>
 
@@ skipping 663 matching lines @@
   TRACE_EVENT1("startup", "StartProcessWithAccess", "type", type_str);
 
   // Propagate the --allow-no-job flag if present.
   if (browser_command_line.HasSwitch(switches::kAllowNoSandboxJob) &&
       !cmd_line->HasSwitch(switches::kAllowNoSandboxJob)) {
     cmd_line->AppendSwitch(switches::kAllowNoSandboxJob);
   }
 
   ProcessDebugFlags(cmd_line);
 
-  // Prefetch hints on windows:
-  // Using a different prefetch profile per process type will allow Windows
-  // to create separate pretetch settings for browser, renderer etc.
-  cmd_line->AppendArg(base::StringPrintf("/prefetch:%d", base::Hash(type_str)));
-
   if ((!delegate->ShouldSandbox()) ||
       browser_command_line.HasSwitch(switches::kNoSandbox) ||
       cmd_line->HasSwitch(switches::kNoSandbox)) {
     base::Process process =
         base::LaunchProcess(*cmd_line, base::LaunchOptions());
     // TODO(rvargas) crbug.com/417532: Don't share a raw handle.
     g_broker_services->AddTargetPeer(process.Handle());
     return process.Pass();
   }
 
@@ skipping 160 matching lines @@
   }
 
   return false;
 }
 
 bool BrokerAddTargetPeer(HANDLE peer_process) {
   return g_broker_services->AddTargetPeer(peer_process) == sandbox::SBOX_ALL_OK;
 }
 
 }  // namespace content