Implement nacl_irt_clock for non-sfi mode.

components/nacl/loader/nonsfi/irt_interfaces.cc

 // Copyright 2014 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 "components/nacl/loader/nonsfi/irt_interfaces.h"
 
 #include <cstring>
 
 namespace nacl {
 namespace nonsfi {
 
 namespace {
 
 // This table keeps a pair of IRT entry (such as nacl_irt_basic, nacl_irt_fdio
 // etc.) and its registered name with its version (such as NACL_IRT_BASIC_v0_1,
 // NACL_IRT_DEV_FDIO_v0_1, etc.).
 struct NaClInterfaceTable {
   const char* name;
   const void* table;
   size_t size;
 };
 
 #define NACL_INTERFACE_TABLE(name, value) { name, &value, sizeof(value) }
 const NaClInterfaceTable kIrtInterfaces[] = {
   NACL_INTERFACE_TABLE(NACL_IRT_BASIC_v0_1, kIrtBasic),
   NACL_INTERFACE_TABLE(NACL_IRT_DEV_FDIO_v0_1, kIrtFdIO),
+  NACL_INTERFACE_TABLE(NACL_IRT_CLOCK_v0_1, kIrtClock),
 };
 #undef NACL_INTERFACE_TABLE
 
 }  // namespace
 
 size_t NaClIrtInterface(const char* interface_ident,
                         void* table, size_t tablesize) {
   for (size_t i = 0; i < arraysize(kIrtInterfaces); ++i) {
     if (std::strcmp(interface_ident, kIrtInterfaces[i].name) == 0) {
       const size_t size = kIrtInterfaces[i].size;
       if (size <= tablesize) {
         std::memcpy(table, kIrtInterfaces[i].table, size);
         return size;
       }
       break;
     }
   }
   return 0;
 }
 
 }  // namespace nonsfi
 }  // namespace nacl