[NaCl SDK] Add nacl_io and sdk_util namespaces.

native_client_sdk/src/libraries/nacl_io_test/kernel_proxy_mock.h

 /* 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.
  */
 
 #ifndef LIBRARIES_NACL_IO_TEST_KERNEL_PROXY_MOCK_H_
 #define LIBRARIES_NACL_IO_TEST_KERNEL_PROXY_MOCK_H_
 
 #include <sys/types.h>
 #include <sys/stat.h>
 #include "gmock/gmock.h"
 
 #include "nacl_io/kernel_proxy.h"
 
-class KernelProxyMock : public KernelProxy {
+class KernelProxyMock : public nacl_io::KernelProxy {
  public:
   KernelProxyMock();
   virtual ~KernelProxyMock();
 
   MOCK_METHOD2(access, int(const char*, int));
   MOCK_METHOD1(chdir, int(const char*));
   MOCK_METHOD2(chmod, int(const char*, mode_t));
   MOCK_METHOD3(chown, int(const char*, uid_t, gid_t));
   MOCK_METHOD1(close, int(int));
   MOCK_METHOD1(dup, int(int));
@@ skipping 21 matching lines @@
   MOCK_METHOD1(unlink, int(const char*));
   MOCK_METHOD2(utime, int(const char*, const struct utimbuf*));
   MOCK_METHOD3(write, ssize_t(int, const void*, size_t));
   MOCK_METHOD2(link, int(const char*, const char*));
   MOCK_METHOD2(symlink, int(const char*, const char*));
   MOCK_METHOD6(mmap, void*(void*, size_t, int, int, int, size_t));
   MOCK_METHOD1(open_resource, int(const char*));
 };
 
 #endif  // LIBRARIES_NACL_IO_TEST_KERNEL_PROXY_MOCK_H_