[NaCl SDK] nacl_io: Remove Node::Access method.

native_client_sdk/src/tests/nacl_io_test/mem_fs_node_test.cc

Index: native_client_sdk/src/tests/nacl_io_test/mem_fs_node_test.cc
diff --git a/native_client_sdk/src/tests/nacl_io_test/mem_fs_node_test.cc b/native_client_sdk/src/tests/nacl_io_test/mem_fs_node_test.cc
index dc521c6986cc3c9108fa8d093b94807209261cd7..f2259d7d4b8c2f259a463de312570cb05e77613f 100644
--- a/native_client_sdk/src/tests/nacl_io_test/mem_fs_node_test.cc
+++ b/native_client_sdk/src/tests/nacl_io_test/mem_fs_node_test.cc
@@ -36,6 +36,15 @@ class MemFsForTesting : public MemFs {
     EXPECT_EQ(0, Init(args));
   }
 
+  bool Exists(const char* filename) {
+    ScopedNode node;
+    if (Open(Path(filename), O_RDONLY, &node))
+      return false;
+
+    struct stat buf;
+    return node->GetStat(&buf) == 0;
+  }
+
   int num_nodes() { return inode_pool_.size(); }
 };