Linux sandbox: cleanup sandbox-bpf naming.

sandbox/linux/seccomp-bpf/trap.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 SANDBOX_LINUX_SECCOMP_BPF_TRAP_H__
 #define SANDBOX_LINUX_SECCOMP_BPF_TRAP_H__
 
 #include <signal.h>
 #include <stdint.h>
 
 #include <map>
 #include <vector>
 
 #include "base/basictypes.h"
 
-namespace playground2 {
+namespace sandbox {
 
 class ErrorCode;
 
 // The Trap class allows a BPF filter program to branch out to user space by
 // raising a SIGSYS signal.
 // N.B.: This class does not perform any synchronization operations. If
 //   modifications are made to any of the traps, it is the caller's
 //   responsibility to ensure that this happens in a thread-safe fashion.
 //   Preferably, that means that no other threads should be running at that
 //   time. For the purposes of our sandbox, this assertion should always be
@@ skipping 77 matching lines @@
   size_t trap_array_capacity_;  // Currently allocated capacity of array
   bool has_unsafe_traps_;       // Whether unsafe traps have been enabled
 
   // Our constructor is private. A shared global instance is created
   // automatically as needed.
   // Copying and assigning is unimplemented. It doesn't make sense for a
   // singleton.
   DISALLOW_IMPLICIT_CONSTRUCTORS(Trap);
 };
 
-}  // namespace playground2
+}  // namespace sandbox
 
 #endif  // SANDBOX_LINUX_SECCOMP_BPF_TRAP_H__