Linux sandbox: cleanup sandbox-bpf naming.

sandbox/linux/seccomp-bpf/trap.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 "sandbox/linux/seccomp-bpf/trap.h"
 
 #include <errno.h>
 #include <signal.h>
 #include <string.h>
 #include <sys/prctl.h>
@@ skipping 47 matching lines @@
 
 bool IsDefaultSignalAction(const struct sigaction& sa) {
   if (sa.sa_flags & SA_SIGINFO || sa.sa_handler != SIG_DFL) {
     return false;
   }
   return true;
 }
 
 }  // namespace
 
-namespace playground2 {
+namespace sandbox {
 
 Trap::Trap()
     : trap_array_(NULL),
       trap_array_size_(0),
       trap_array_capacity_(0),
       has_unsafe_traps_(false) {
   // Set new SIGSYS handler
   struct sigaction sa = {};
   sa.sa_sigaction = SigSysAction;
   sa.sa_flags = SA_SIGINFO | SA_NODEFER;
@@ skipping 265 matching lines @@
 ErrorCode Trap::ErrorCodeFromTrapId(uint16_t id) {
   if (global_trap_ && id > 0 && id <= global_trap_->trap_array_size_) {
     return global_trap_->trap_array_[id - 1];
   } else {
     return ErrorCode();
   }
 }
 
 Trap* Trap::global_trap_;
 
-}  // namespace playground2
+}  // namespace sandbox