Use ChannelMojo from the browser to NaCl loader process.

ppapi/nacl_irt/irt_start.cc

Index: ppapi/nacl_irt/irt_start.cc
diff --git a/ppapi/nacl_irt/irt_start.cc b/ppapi/nacl_irt/irt_start.cc
index 9390acecf5719ec37871ec92ad0baf7b0cb1f9d6..acdec0936f36332a108053a7179bec4971845c1b 100644
--- a/ppapi/nacl_irt/irt_start.cc
+++ b/ppapi/nacl_irt/irt_start.cc
@@ -35,7 +35,7 @@ void nacl_irt_start(uint32_t* info) {
       MakeIPCHandle("NaCl Browser", NACL_CHROME_DESC_BASE),
       MakeIPCHandle("NaCl Renderer", NACL_CHROME_DESC_BASE + 1),
       MakeIPCHandle("NaCl Manifest", NACL_CHROME_DESC_BASE + 2));
-  ppapi::StartUpPlugin();
+  ppapi::StartUpPlugin(true);
 
   nacl_irt_enter_user_code(info, chrome_irt_query);
 }