Linux sandbox: cleanup sandbox-bpf naming.

content/public/common/sandbox_init.h

Index: content/public/common/sandbox_init.h
diff --git a/content/public/common/sandbox_init.h b/content/public/common/sandbox_init.h
index 33a76c257cea2221ec20eb4ba8fdd4ff61629c79..7a239f5f1fd91f7d688fa3ab55c40c23c54c34a7 100644
--- a/content/public/common/sandbox_init.h
+++ b/content/public/common/sandbox_init.h
@@ -16,11 +16,8 @@ namespace base {
 class FilePath;
 }
 
-namespace playground2 {
-class SandboxBpfPolicy;
-}
-
 namespace sandbox {
+class SandboxBpfPolicy;
 struct SandboxInterfaceInfo;
 }
 
@@ -90,11 +87,11 @@ class SandboxInitializerDelegate;
 // Initialize a seccomp-bpf sandbox. |policy| may not be NULL.
 // Returns true if the sandbox has been properly engaged.
 CONTENT_EXPORT bool InitializeSandbox(
-    scoped_ptr<playground2::SandboxBpfPolicy> policy);
+    scoped_ptr<sandbox::SandboxBpfPolicy> policy);
 
 // Return a "baseline" policy. This is used by a SandboxInitializerDelegate to
 // implement a policy that is derived from the baseline.
-CONTENT_EXPORT scoped_ptr<playground2::SandboxBpfPolicy>
+CONTENT_EXPORT scoped_ptr<sandbox::SandboxBpfPolicy>
 GetBpfSandboxBaselinePolicy();
 #endif  // defined(OS_LINUX)