Linux Sandbox: get everything to compile on Android.

sandbox/linux/seccomp-bpf/sandbox_bpf_unittest.cc

 // 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.
 
 #include <sys/syscall.h>
 #include <sys/utsname.h>
 
 #include <ostream>
 
 #include "base/memory/scoped_ptr.h"
 #include "sandbox/linux/seccomp-bpf/bpf_tests.h"
 #include "sandbox/linux/seccomp-bpf/syscall.h"
 #include "sandbox/linux/seccomp-bpf/verifier.h"
 #include "sandbox/linux/services/broker_process.h"
 #include "sandbox/linux/services/linux_syscalls.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+// Workaround for Android's prctl.h file.
+#if !defined(PR_CAPBSET_READ)
+#define PR_CAPBSET_READ 23
+#define PR_CAPBSET_DROP 24
+#endif
+
 using namespace playground2;
 using sandbox::BrokerProcess;
 
 namespace {
 
 const int kExpectedReturnValue = 42;
 
 // This test should execute no matter whether we have kernel support. So,
 // we make it a TEST() instead of a BPF_TEST().
 TEST(SandboxBpf, CallSupports) {
@@ skipping 927 matching lines @@
                DEATH_MESSAGE("Unexpected 64bit argument detected"),
                EqualityWithNegativeArgumentsPolicy) {
   // When expecting a 32bit system call argument, we look at the MSB of the
   // 64bit value and allow both "0" and "-1". But the latter is allowed only
   // iff the LSB was negative. So, this death test should error out.
   BPF_ASSERT(SandboxSyscall(__NR_uname, 0xFFFFFFFF00000000ll) == -1);
 }
 #endif
 
 } // namespace