PNaCl on-demand installs: Make a separate async IPC to check if PNaCl is installed

ppapi/native_client/src/untrusted/pnacl_irt_shim/pnacl_shim.c

 /* Copyright (c) 2013 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.
  */
 
 /* NOTE: this is auto-generated from IDL */
 #include "ppapi/generators/pnacl_shim.h"
 
 #include "ppapi/c/ppb.h"
 #include "ppapi/c/dev/ppb_audio_input_dev.h"
@@ skipping 2750 matching lines @@
 static PP_Bool Pnacl_M13_PPB_NaCl_Private_Are3DInterfacesDisabled(void) {
   const struct PPB_NaCl_Private_1_0 *iface = Pnacl_WrapperInfo_PPB_NaCl_Private_1_0.real_iface;
   return iface->Are3DInterfacesDisabled();
 }
 
 static int32_t Pnacl_M13_PPB_NaCl_Private_BrokerDuplicateHandle(PP_FileHandle source_handle, uint32_t process_id, PP_FileHandle* target_handle, uint32_t desired_access, uint32_t options) {
   const struct PPB_NaCl_Private_1_0 *iface = Pnacl_WrapperInfo_PPB_NaCl_Private_1_0.real_iface;
   return iface->BrokerDuplicateHandle(source_handle, process_id, target_handle, desired_access, options);
 }
 
+static int32_t Pnacl_M13_PPB_NaCl_Private_EnsurePnaclInstalled(PP_Instance instance, struct PP_CompletionCallback* callback) {
+  const struct PPB_NaCl_Private_1_0 *iface = Pnacl_WrapperInfo_PPB_NaCl_Private_1_0.real_iface;
+  return iface->EnsurePnaclInstalled(instance, *callback);
+}
+
 static PP_FileHandle Pnacl_M13_PPB_NaCl_Private_GetReadonlyPnaclFd(const char* filename) {
   const struct PPB_NaCl_Private_1_0 *iface = Pnacl_WrapperInfo_PPB_NaCl_Private_1_0.real_iface;
   return iface->GetReadonlyPnaclFd(filename);
 }
 
 static PP_FileHandle Pnacl_M13_PPB_NaCl_Private_CreateTemporaryFile(PP_Instance instance) {
   const struct PPB_NaCl_Private_1_0 *iface = Pnacl_WrapperInfo_PPB_NaCl_Private_1_0.real_iface;
   return iface->CreateTemporaryFile(instance);
 }
 
@@ skipping 1784 matching lines @@
     .GetOwnerElementObject = (struct PP_Var (*)(PP_Instance instance))&Pnacl_M13_PPB_Instance_Private_GetOwnerElementObject,
     .ExecuteScript = (struct PP_Var (*)(PP_Instance instance, struct PP_Var script, struct PP_Var* exception))&Pnacl_M13_PPB_Instance_Private_ExecuteScript
 };
 
 struct PPB_NaCl_Private_1_0 Pnacl_Wrappers_PPB_NaCl_Private_1_0 = {
     .LaunchSelLdr = (PP_NaClResult (*)(PP_Instance instance, const char* alleged_url, PP_Bool uses_irt, PP_Bool uses_ppapi, PP_Bool enable_ppapi_dev, PP_Bool enable_dyncode_syscalls, PP_Bool enable_exception_handling, void* imc_handle, struct PP_Var* error_message))&Pnacl_M13_PPB_NaCl_Private_LaunchSelLdr,
     .StartPpapiProxy = (PP_NaClResult (*)(PP_Instance instance))&Pnacl_M13_PPB_NaCl_Private_StartPpapiProxy,
     .UrandomFD = (int32_t (*)(void))&Pnacl_M13_PPB_NaCl_Private_UrandomFD,
     .Are3DInterfacesDisabled = (PP_Bool (*)(void))&Pnacl_M13_PPB_NaCl_Private_Are3DInterfacesDisabled,
     .BrokerDuplicateHandle = (int32_t (*)(PP_FileHandle source_handle, uint32_t process_id, PP_FileHandle* target_handle, uint32_t desired_access, uint32_t options))&Pnacl_M13_PPB_NaCl_Private_BrokerDuplicateHandle,
+    .EnsurePnaclInstalled = (int32_t (*)(PP_Instance instance, struct PP_CompletionCallback callback))&Pnacl_M13_PPB_NaCl_Private_EnsurePnaclInstalled,
     .GetReadonlyPnaclFd = (PP_FileHandle (*)(const char* filename))&Pnacl_M13_PPB_NaCl_Private_GetReadonlyPnaclFd,
     .CreateTemporaryFile = (PP_FileHandle (*)(PP_Instance instance))&Pnacl_M13_PPB_NaCl_Private_CreateTemporaryFile,
     .GetNexeFd = (int32_t (*)(PP_Instance instance, const char* pexe_url, uint32_t abi_version, uint32_t opt_level, const char* last_modified, const char* etag, PP_Bool* is_hit, PP_FileHandle* nexe_handle, struct PP_CompletionCallback callback))&Pnacl_M13_PPB_NaCl_Private_GetNexeFd,
     .ReportTranslationFinished = (void (*)(PP_Instance instance))&Pnacl_M13_PPB_NaCl_Private_ReportTranslationFinished,
     .IsOffTheRecord = (PP_Bool (*)(void))&Pnacl_M13_PPB_NaCl_Private_IsOffTheRecord,
     .IsPnaclEnabled = (PP_Bool (*)(void))&Pnacl_M13_PPB_NaCl_Private_IsPnaclEnabled,
     .ReportNaClError = (PP_NaClResult (*)(PP_Instance instance, PP_NaClError message_id))&Pnacl_M13_PPB_NaCl_Private_ReportNaClError,
     .OpenNaClExecutable = (PP_FileHandle (*)(PP_Instance instance, const char* file_url, uint64_t* file_token_lo, uint64_t* file_token_hi))&Pnacl_M13_PPB_NaCl_Private_OpenNaClExecutable
 };
 
@@ skipping 975 matching lines @@
     if (NULL == iface) return NULL;
     wrapper->real_iface = iface;
   }
 
   if (wrapper->wrapped_iface) {
     return wrapper->wrapped_iface;
   } else {
     return wrapper->real_iface;
   }
 }