Linux Sandbox: split the GPU policies to their own file.

content/common/sandbox_linux/bpf_cros_arm_gpu_policy_linux.h

 // Copyright 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_SANDBOX_BPF_POLICY_H_
-#define SANDBOX_LINUX_SECCOMP_BPF_SANDBOX_BPF_POLICY_H_
+#ifndef CONTENT_COMMON_SANDBOX_LINUX_BPF_CROS_ARM_GPU_POLICY_LINUX_H_
+#define CONTENT_COMMON_SANDBOX_LINUX_BPF_CROS_ARM_GPU_POLICY_LINUX_H_
 
-#include "base/basictypes.h"
+#include "content/common/sandbox_linux/bpf_gpu_policy_linux.h"
 
-namespace sandbox {
+namespace content {
 
-class ErrorCode;
-class SandboxBPF;
+// This policy is for Chrome OS ARM.
+class CrosArmGpuProcessPolicy : public GpuProcessPolicy {
+ public:
+  explicit CrosArmGpuProcessPolicy(bool allow_shmat);
+  virtual ~CrosArmGpuProcessPolicy();
 
-// This is the interface to implement to define a BPF sandbox policy.
-class SandboxBPFPolicy {
- public:
-  SandboxBPFPolicy() {}
-  virtual ~SandboxBPFPolicy() {}
-
-  // The EvaluateSyscall method is called with the system call number. It can
-  // decide to allow the system call unconditionally by returning ERR_ALLOWED;
-  // it can deny the system call unconditionally by returning an appropriate
-  // "errno" value; or it can request inspection of system call argument(s) by
-  // returning a suitable ErrorCode.
   virtual ErrorCode EvaluateSyscall(SandboxBPF* sandbox_compiler,
-                                    int system_call_number) const = 0;
+                                    int system_call_number) const OVERRIDE;
+  virtual bool PreSandboxHook() OVERRIDE;
 
  private:
-  DISALLOW_COPY_AND_ASSIGN(SandboxBPFPolicy);
+  const bool allow_shmat_;  // Allow shmat(2).
+  DISALLOW_COPY_AND_ASSIGN(CrosArmGpuProcessPolicy);
 };
 
-}  // namespace sandbox
+}  // namespace content
 
-#endif  // SANDBOX_LINUX_SECCOMP_BPF_SANDBOX_BPF_POLICY_H_
+#endif // CONTENT_COMMON_SANDBOX_LINUX_BPF_CROS_ARM_GPU_POLICY_LINUX_H_