Linux sandbox: cleanup sandbox-bpf naming.

sandbox/linux/seccomp-bpf-helpers/baseline_policy.h

 // Copyright (c) 2013 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_HELPERS_BASELINE_POLICY_H_
 #define SANDBOX_LINUX_SECCOMP_BPF_HELPERS_BASELINE_POLICY_H_
 
 #include "sandbox/linux/seccomp-bpf/errorcode.h"
 #include "sandbox/linux/seccomp-bpf/sandbox_bpf_policy.h"
 
-namespace playground2 {
-class Sandbox;
-class SandboxBpfPolicy;
-}
+namespace sandbox {
 
-using playground2::ErrorCode;
-using playground2::Sandbox;
-using playground2::SandboxBpfPolicy;
-
-namespace sandbox {
+class SandboxBPF;
+class SandboxBPFPolicy;
 
 // This is a helper to build seccomp-bpf policies, i.e. policies for a sandbox
 // that reduces the Linux kernel's attack surface. Given its nature, it doesn't
 // have a clear semantics and is mostly "implementation-defined".
 //
-// This returns an object that implements the SandboxBpfPolicy interface with
+// This returns an object that implements the SandboxBPFPolicy interface with
 // a "baseline" policy within Chromium.
 // The "baseline" policy is somewhat arbitrary. All Chromium policies are an
 // alteration of it, and it represents a reasonable common ground to run most
 // code in a sandboxed environment.
-class BaselinePolicy : public SandboxBpfPolicy {
+class BaselinePolicy : public SandboxBPFPolicy {
  public:
   BaselinePolicy();
   // |fs_denied_errno| is the errno returned when a filesystem access system
   // call is denied.
   explicit BaselinePolicy(int fs_denied_errno);
   virtual ~BaselinePolicy();
 
-  virtual ErrorCode EvaluateSyscall(Sandbox* sandbox_compiler,
+  virtual ErrorCode EvaluateSyscall(SandboxBPF* sandbox_compiler,
                                     int system_call_number) const OVERRIDE;
   // TODO(jln): remove once NaCl uses the new policy format. Do not use in new
   // code. This is the same as EvaluateSyscall. |aux| must be NULL.
-  static ErrorCode BaselinePolicyDeprecated(Sandbox* sandbox,
+  static ErrorCode BaselinePolicyDeprecated(SandboxBPF* sandbox,
                                             int sysno,
                                             void* aux);
 
  private:
   int fs_denied_errno_;
   DISALLOW_COPY_AND_ASSIGN(BaselinePolicy);
 };
 
 }  // namespace sandbox.
 
 #endif  // SANDBOX_LINUX_SECCOMP_BPF_HELPERS_BASELINE_POLICY_H_