Exclude ProtectorService code from Android build.

chrome/browser/protector/protector.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 <vector>
+
+#include "base/command_line.h"
+#include "base/logging.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/protector/keys.h"
+#include "chrome/common/chrome_switches.h"
+#include "crypto/hmac.h"
+
+namespace protector {
+
+std::string SignSetting(const std::string& value) {
+  crypto::HMAC hmac(crypto::HMAC::SHA256);
+  if (!hmac.Init(kProtectorSigningKey)) {
+    LOG(WARNING) << "Failed to initialize HMAC algorithm for signing";
+    return std::string();
+  }
+
+  std::vector<unsigned char> digest(hmac.DigestLength());
+  if (!hmac.Sign(value, &digest[0], digest.size())) {
+    LOG(WARNING) << "Failed to sign setting";
+    return std::string();
+  }
+
+  return std::string(&digest[0], &digest[0] + digest.size());
+}
+
+bool IsSettingValid(const std::string& value, const std::string& signature) {
+  crypto::HMAC hmac(crypto::HMAC::SHA256);
+  if (!hmac.Init(kProtectorSigningKey)) {
+    LOG(WARNING) << "Failed to initialize HMAC algorithm for verification.";
+    return false;
+  }
+  return hmac.Verify(value, signature);
+}
+
+bool IsEnabled() {
+  return !CommandLine::ForCurrentProcess()->HasSwitch(switches::kNoProtector);
+}
+
+}  // namespace protector