Prototype: Use Chromium IPC for plugin LOAD_MODULE.

ppapi/api/private/ppb_nacl_private.idl

Index: ppapi/api/private/ppb_nacl_private.idl
diff --git a/ppapi/api/private/ppb_nacl_private.idl b/ppapi/api/private/ppb_nacl_private.idl
index 4e215d7fa89caa934c09c74b214a897fdfc197df..e12ca738f0eb8e325772012bd2aabff983780e85 100644
--- a/ppapi/api/private/ppb_nacl_private.idl
+++ b/ppapi/api/private/ppb_nacl_private.idl
@@ -54,16 +54,18 @@ interface PPB_NaCl_Private {
    * the nexe contribute to crash throttling statisics and whether nexe starts
    * are throttled by crash throttling.
    */
-  PP_ExternalPluginResult LaunchSelLdr([in] PP_Instance instance,
-                                       [in] str_t alleged_url,
-                                       [in] PP_Bool uses_irt,
-                                       [in] PP_Bool uses_ppapi,
-                                       [in] PP_Bool enable_ppapi_dev,
-                                       [in] PP_Bool enable_dyncode_syscalls,
-                                       [in] PP_Bool enable_exception_handling,
-                                       [in] PP_Bool enable_crash_throttling,
-                                       [out] mem_t imc_handle,
-                                       [out] PP_Var error_message);
+  void LaunchSelLdr(
+      [in] PP_Instance instance,
+      [in] str_t alleged_url,
+      [in] PP_Bool uses_irt,
+      [in] PP_Bool uses_ppapi,
+      [in] PP_Bool enable_ppapi_dev,
+      [in] PP_Bool enable_dyncode_syscalls,
+      [in] PP_Bool enable_exception_handling,
+      [in] PP_Bool enable_crash_throttling,
+      [out] mem_t imc_handle,
+      [out] PP_Var error_message,
+      [in] PP_CompletionCallback connected_callback);
 
   /* This function starts the IPC proxy so the nexe can communicate with the
    * browser. Returns PP_EXTERNAL_PLUGIN_OK on success, otherwise a result code
@@ -176,4 +178,11 @@ interface PPB_NaCl_Private {
   void SetReadOnlyProperty([in] PP_Instance instance,
                            [in] PP_Var key,
                            [in] PP_Var value);
+
+  /* Loads the module specified by |nexe_handle|. */
+  PP_Bool LoadModule([in] PP_Instance instance,
+                     [in] PP_FileHandle nexe_handle,
+                     [out] uint32_t nacl_error_code);
+
+  PP_Bool StartModule([in] PP_Instance instance);
 };