[NaCl SDK] Add nacl_io and sdk_util namespaces.

native_client_sdk/src/libraries/nacl_io/kernel_proxy.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 "nacl_io/kernel_proxy.h"
 
 #include <assert.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <pthread.h>
@@ skipping 15 matching lines @@
 #include "nacl_io/path.h"
 #include "nacl_io/pepper_interface.h"
 #include "nacl_io/typed_mount_factory.h"
 #include "sdk_util/auto_lock.h"
 #include "sdk_util/ref_object.h"
 
 #ifndef MAXPATHLEN
 #define MAXPATHLEN 256
 #endif
 
-// TODO(noelallen) : Grab/Redefine these in the kernel object once available.
-#define USR_ID 1002
-#define GRP_ID 1003
+namespace nacl_io {
 
 KernelProxy::KernelProxy() : dev_(0), ppapi_(NULL) {
 }
 
 KernelProxy::~KernelProxy() {
   // Clean up the MountFactories.
   for (MountFactoryMap_t::iterator i = factories_.begin();
        i != factories_.end();
        ++i) {
     delete i->second;
@@ skipping 586 matching lines @@
   // Unfortunately, munmap still needs to acquire other locks; see the call to
   // ReleaseHandle below which takes the process lock. This is safe as long as
   // this is never executed from free() -- we can be reasonably sure this is
   // true, because malloc only makes anonymous mmap() requests, and should only
   // be munmapping those allocations. We never add to mmap_info_list_ for
   // anonymous maps, so the unmap_list should always be empty when called from
   // free().
   return 0;
 }
 
+}  // namespace nacl_io
+