Use a valid /prefetch argument when launching a process.

content/browser/utility_process_host_impl.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/browser/utility_process_host_impl.h"
 
 #include <utility>
 
 #include "base/base_switches.h"
 #include "base/bind.h"
@@ skipping 294 matching lines @@
 
       base::CommandLine* cmd_line = new base::CommandLine(exe_path);
     #endif
 
     cmd_line->AppendSwitchASCII(switches::kProcessType,
                                 switches::kUtilityProcess);
     cmd_line->AppendSwitchASCII(switches::kProcessChannelID, channel_id);
     std::string locale = GetContentClient()->browser()->GetApplicationLocale();
     cmd_line->AppendSwitchASCII(switches::kLang, locale);
 
+#if defined(OS_WIN)
+    if (GetContentClient()->browser()->ShouldUseWindowsPrefetchArgument())
+      cmd_line->AppendArg(switches::kPrefetchArgumentOther);
+#endif  // defined(OS_WIN)
+
     if (no_sandbox_)
       cmd_line->AppendSwitch(switches::kNoSandbox);
 
     // Browser command-line switches to propagate to the utility process.
     static const char* const kSwitchNames[] = {
       switches::kDebugPluginLoading,
       switches::kNoSandbox,
       switches::kProfilerTiming,
 #if defined(OS_MACOSX)
       switches::kEnableSandboxLogging,
@@ skipping 72 matching lines @@
     if (RenderProcessHost::run_renderer_in_process())
       handle = base::GetCurrentProcessHandle();
     else
       handle = process_->GetData().handle;
 
     mojo_application_host_->Activate(this, handle);
   }
 }
 
 }  // namespace content