[NaCl SDK] nacl_io: Added support for access() syscall.

native_client_sdk/src/libraries/nacl_io_test/kernel_object_test.cc

 /* 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.
  */
 
 #include <errno.h>
 #include <fcntl.h>
 #include <pthread.h>
 #include <sys/stat.h>
 
@@ skipping 12 matching lines @@
 class MountRefMock : public Mount {
  public:
   MountRefMock(int* mount_count, int* handle_count)
       : mount_count(mount_count), handle_count(handle_count) {
     (*mount_count)++;
   }
 
   ~MountRefMock() { (*mount_count)--; }
 
  public:
+  Error Access(const Path& path, int a_mode) { return ENOSYS; }
   Error Open(const Path& path, int mode, MountNode** out_node) {
     *out_node = NULL;
     return ENOSYS;
   }
   Error Unlink(const Path& path) { return 0; }
   Error Mkdir(const Path& path, int permissions) { return 0; }
   Error Rmdir(const Path& path) { return 0; }
   Error Remove(const Path& path) { return 0; }
 
  public:
@@ skipping 145 matching lines @@
 
   EXPECT_EQ(1, handle_count);
   EXPECT_EQ(3, handle->RefCount());
 
   proxy->FreeFD(0);
   proxy->FreeFD(2);
   proxy->ReleaseHandle(handle);  // handle is constructed with a refcount of 1.
 
   EXPECT_EQ(0, handle_count);
 }