Linux sandbox: cleanup sandbox-bpf naming.

content/common/sandbox_seccomp_bpf_linux.h

Index: content/common/sandbox_seccomp_bpf_linux.h
diff --git a/content/common/sandbox_seccomp_bpf_linux.h b/content/common/sandbox_seccomp_bpf_linux.h
index a32973d7b95964b8b1803fd828af812f6538194f..0ed0edfdd2ab40adef4684263f17f03a922dd4cf 100644
--- a/content/common/sandbox_seccomp_bpf_linux.h
+++ b/content/common/sandbox_seccomp_bpf_linux.h
@@ -10,7 +10,7 @@
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 
-namespace playground2 {
+namespace sandbox {
 class SandboxBpfPolicy;
 }
 
@@ -39,9 +39,9 @@ class SandboxSeccompBpf {
   // This is the API to enable a seccomp-bpf sandbox by using an
   // external policy.
   static bool StartSandboxWithExternalPolicy(
-      scoped_ptr<playground2::SandboxBpfPolicy> policy);
+      scoped_ptr<sandbox::SandboxBpfPolicy> policy);
   // The "baseline" policy can be a useful base to build a sandbox policy.
-  static scoped_ptr<playground2::SandboxBpfPolicy> GetBaselinePolicy();
+  static scoped_ptr<sandbox::SandboxBpfPolicy> GetBaselinePolicy();
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(SandboxSeccompBpf);