Linux sandbox: cleanup sandbox-bpf naming.

sandbox/linux/seccomp-bpf/die.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_DIE_H__
 #define SANDBOX_LINUX_SECCOMP_BPF_DIE_H__
 
 #include "base/basictypes.h"
 
-namespace playground2 {
+namespace sandbox {
 
 // This is the main API for using this file. Prints a error message and
 // exits with a fatal error. This is not async-signal safe.
-#define SANDBOX_DIE(m) playground2::Die::SandboxDie(m, __FILE__, __LINE__)
+#define SANDBOX_DIE(m) sandbox::Die::SandboxDie(m, __FILE__, __LINE__)
 
 // An async signal safe version of the same API. Won't print the filename
 // and line numbers.
-#define RAW_SANDBOX_DIE(m) playground2::Die::RawSandboxDie(m)
+#define RAW_SANDBOX_DIE(m) sandbox::Die::RawSandboxDie(m)
 
 // Adds an informational message to the log file or stderr as appropriate.
-#define SANDBOX_INFO(m) playground2::Die::SandboxInfo(m, __FILE__, __LINE__)
+#define SANDBOX_INFO(m) sandbox::Die::SandboxInfo(m, __FILE__, __LINE__)
 
 class Die {
  public:
   // Terminate the program, even if the current sandbox policy prevents some
   // of the more commonly used functions used for exiting.
   // Most users would want to call SANDBOX_DIE() instead, as it logs extra
   // information. But calling ExitGroup() is correct and in some rare cases
   // preferable. So, we make it part of the public API.
   static void ExitGroup() __attribute__((noreturn));
 
@@ skipping 23 matching lines @@
   // unittests).
   static void SuppressInfoMessages(bool flag) { suppress_info_ = flag; }
 
  private:
   static bool simple_exit_;
   static bool suppress_info_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(Die);
 };
 
-}  // namespace
+}  // namespace sandbox
 
 #endif  // SANDBOX_LINUX_SECCOMP_BPF_DIE_H__