When launching PNaCl helper nexes, explicitly disable IRT loading.

chrome/browser/nacl_host/nacl_process_host.h

 // 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.
 
 #ifndef CHROME_BROWSER_NACL_HOST_NACL_PROCESS_HOST_H_
 #define CHROME_BROWSER_NACL_HOST_NACL_PROCESS_HOST_H_
 
 #include "build/build_config.h"
 
 #include "base/file_path.h"
@@ skipping 32 matching lines @@
 class NaClProcessHost : public content::BrowserChildProcessHostDelegate {
  public:
   // manifest_url: the URL of the manifest of the Native Client plugin being
   // executed.
   // render_view_id: RenderView routing id, to control access to private APIs.
   // permission_bits: controls which interfaces the NaCl plugin can use.
   // off_the_record: was the process launched from an incognito renderer?
   NaClProcessHost(const GURL& manifest_url,
                   int render_view_id,
                   uint32 permission_bits,
+                  bool uses_irt,
                   bool off_the_record);
   virtual ~NaClProcessHost();
 
   // Do any minimal work that must be done at browser startup.
   static void EarlyStartup();
 
   // Initialize the new NaCl process. Result is returned by sending ipc
   // message reply_msg.
   void Launch(ChromeRenderMessageFilter* chrome_render_message_filter,
               IPC::Message* reply_msg,
@@ skipping 124 matching lines @@
   // Socket pairs for the NaCl process and renderer.
   scoped_ptr<NaClInternal> internal_;
 
   base::WeakPtrFactory<NaClProcessHost> weak_factory_;
 
   scoped_ptr<content::BrowserChildProcessHost> process_;
 
   bool enable_exception_handling_;
   bool enable_debug_stub_;
 
+  bool uses_irt_;
+
   bool off_the_record_;
 
   bool enable_ipc_proxy_;
 
   // Channel proxy to terminate the NaCl-Browser PPAPI channel.
   scoped_ptr<IPC::ChannelProxy> ipc_proxy_channel_;
   // Plugin listener, to forward browser channel messages to us.
   PluginListener ipc_plugin_listener_;
   // Browser host for plugin process.
   scoped_ptr<content::BrowserPpapiHost> ppapi_host_;
 
   int render_view_id_;
 
   DISALLOW_COPY_AND_ASSIGN(NaClProcessHost);
 };
 
 #endif  // CHROME_BROWSER_NACL_HOST_NACL_PROCESS_HOST_H_