[Android] Fix x86 build after 1f6acfe7dd08.

content/common/sandbox_linux/android/sandbox_bpf_base_policy_android.cc

Index: content/common/sandbox_linux/android/sandbox_bpf_base_policy_android.cc
diff --git a/content/common/sandbox_linux/android/sandbox_bpf_base_policy_android.cc b/content/common/sandbox_linux/android/sandbox_bpf_base_policy_android.cc
index 481ab39b268af043ac28b539b23d19973a986680..be6a91c6c6791819910d2e2a63068fa6a4b78c4b 100644
--- a/content/common/sandbox_linux/android/sandbox_bpf_base_policy_android.cc
+++ b/content/common/sandbox_linux/android/sandbox_bpf_base_policy_android.cc
@@ -40,6 +40,7 @@ namespace content {
 
 namespace {
 
+#if !defined(__i386__)
 // Restricts the arguments to sys_socket() to AF_UNIX. Returns a BoolExpr that
 // evaluates to true if the syscall should be allowed.
 BoolExpr RestrictSocketArguments(const Arg<int>& domain,
@@ -51,6 +52,7 @@ BoolExpr RestrictSocketArguments(const Arg<int>& domain,
                      (type & ~kSockFlags) == SOCK_STREAM),
                protocol == 0);
 }
+#endif  // !defined(__i386__)
 
 }  // namespace