Large IWYU cleanup for seccomp-bpf

sandbox/linux/seccomp-bpf/codegen_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 "sandbox/linux/seccomp-bpf/codegen.h"
+
 #include <errno.h>
+#include <linux/filter.h>
 
-#include <algorithm>
 #include <set>
+#include <string>
 #include <vector>
 
-#include "sandbox/linux/seccomp-bpf/codegen.h"
+#include "sandbox/linux/seccomp-bpf/basicblock.h"
+#include "sandbox/linux/seccomp-bpf/errorcode.h"
+#include "sandbox/linux/seccomp-bpf/instruction.h"
 #include "sandbox/linux/seccomp-bpf/sandbox_bpf.h"
 #include "sandbox/linux/tests/unit_tests.h"
 
 namespace sandbox {
 
 class SandboxUnittestHelper : public SandboxBPF {
  public:
   typedef SandboxBPF::Program Program;
 };
 
@@ skipping 507 matching lines @@
     assembly.append(reinterpret_cast<char*>(&insn.k), sizeof(insn.k));
   }
   SANDBOX_ASSERT(source == assembly);
 }
 
 SANDBOX_TEST(CodeGen, All) {
   ForAllPrograms(CompileAndCompare);
 }
 
 }  // namespace sandbox