diff --git a/cros/hardware_chromeos.cc b/cros/hardware_chromeos.cc
new file mode 100644
index 0000000..b9018ff
--- /dev/null
+++ b/cros/hardware_chromeos.cc
@@ -0,0 +1,364 @@
+//
+// Copyright (C) 2013 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#include "update_engine/cros/hardware_chromeos.h"
+
+#include <utility>
+
+#include <base/files/file_path.h>
+#include <base/files/file_util.h>
+#include <base/logging.h>
+#include <base/strings/string_number_conversions.h>
+#include <base/strings/string_util.h>
+#include <brillo/key_value_store.h>
+#include <debugd/dbus-constants.h>
+#include <vboot/crossystem.h>
+
+extern "C" {
+#include "vboot/vboot_host.h"
+}
+
+#include "update_engine/common/constants.h"
+#include "update_engine/common/hardware.h"
+#include "update_engine/common/hwid_override.h"
+#include "update_engine/common/platform_constants.h"
+#include "update_engine/common/subprocess.h"
+#include "update_engine/common/utils.h"
+#include "update_engine/cros/dbus_connection.h"
+#if USE_CFM
+#include "update_engine/cros/requisition_util.h"
+#endif
+
+using std::string;
+using std::vector;
+
+namespace {
+
+const char kOOBECompletedMarker[] = "/home/chronos/.oobe_completed";
+
+// The stateful directory used by update_engine to store powerwash-safe files.
+// The files stored here must be added to the powerwash script allowlist.
+const char kPowerwashSafeDirectory[] =
+    "/mnt/stateful_partition/unencrypted/preserve";
+
+// The powerwash_count marker file contains the number of times the device was
+// powerwashed. This value is incremented by the clobber-state script when
+// a powerwash is performed.
+const char kPowerwashCountMarker[] = "powerwash_count";
+
+// The name of the marker file used to trigger powerwash when post-install
+// completes successfully so that the device is powerwashed on next reboot.
+const char kPowerwashMarkerFile[] =
+    "/mnt/stateful_partition/factory_install_reset";
+
+// The name of the marker file used to trigger a save of rollback data
+// during the next shutdown.
+const char kRollbackSaveMarkerFile[] =
+    "/mnt/stateful_partition/.save_rollback_data";
+
+// The contents of the powerwash marker file for the non-rollback case.
+const char kPowerwashCommand[] = "safe fast keepimg reason=update_engine\n";
+
+// The contents of the powerwas marker file for the rollback case.
+const char kRollbackPowerwashCommand[] =
+    "safe fast keepimg rollback reason=update_engine\n";
+
+// UpdateManager config path.
+const char* kConfigFilePath = "/etc/update_manager.conf";
+
+// UpdateManager config options:
+const char* kConfigOptsIsOOBEEnabled = "is_oobe_enabled";
+
+const char* kActivePingKey = "first_active_omaha_ping_sent";
+
+}  // namespace
+
+namespace chromeos_update_engine {
+
+namespace hardware {
+
+// Factory defined in hardware.h.
+std::unique_ptr<HardwareInterface> CreateHardware() {
+  std::unique_ptr<HardwareChromeOS> hardware(new HardwareChromeOS());
+  hardware->Init();
+  return std::move(hardware);
+}
+
+}  // namespace hardware
+
+void HardwareChromeOS::Init() {
+  LoadConfig("" /* root_prefix */, IsNormalBootMode());
+  debugd_proxy_.reset(
+      new org::chromium::debugdProxy(DBusConnection::Get()->GetDBus()));
+}
+
+bool HardwareChromeOS::IsOfficialBuild() const {
+  return VbGetSystemPropertyInt("debug_build") == 0;
+}
+
+bool HardwareChromeOS::IsNormalBootMode() const {
+  bool dev_mode = VbGetSystemPropertyInt("devsw_boot") != 0;
+  return !dev_mode;
+}
+
+bool HardwareChromeOS::AreDevFeaturesEnabled() const {
+  // Even though the debugd tools are also gated on devmode, checking here can
+  // save us a D-Bus call so it's worth doing explicitly.
+  if (IsNormalBootMode())
+    return false;
+
+  int32_t dev_features = debugd::DEV_FEATURES_DISABLED;
+  brillo::ErrorPtr error;
+  // Some boards may not include debugd so it's expected that this may fail,
+  // in which case we treat it as disabled.
+  if (debugd_proxy_ && debugd_proxy_->QueryDevFeatures(&dev_features, &error) &&
+      !(dev_features & debugd::DEV_FEATURES_DISABLED)) {
+    LOG(INFO) << "Debugd dev tools enabled.";
+    return true;
+  }
+  return false;
+}
+
+bool HardwareChromeOS::IsOOBEEnabled() const {
+  return is_oobe_enabled_;
+}
+
+bool HardwareChromeOS::IsOOBEComplete(base::Time* out_time_of_oobe) const {
+  if (!is_oobe_enabled_) {
+    LOG(WARNING) << "OOBE is not enabled but IsOOBEComplete() was called";
+  }
+  struct stat statbuf;
+  if (stat(kOOBECompletedMarker, &statbuf) != 0) {
+    if (errno != ENOENT) {
+      PLOG(ERROR) << "Error getting information about " << kOOBECompletedMarker;
+    }
+    return false;
+  }
+
+  if (out_time_of_oobe != nullptr)
+    *out_time_of_oobe = base::Time::FromTimeT(statbuf.st_mtime);
+  return true;
+}
+
+static string ReadValueFromCrosSystem(const string& key) {
+  char value_buffer[VB_MAX_STRING_PROPERTY];
+
+  const char* rv = VbGetSystemPropertyString(
+      key.c_str(), value_buffer, sizeof(value_buffer));
+  if (rv != nullptr) {
+    string return_value(value_buffer);
+    base::TrimWhitespaceASCII(return_value, base::TRIM_ALL, &return_value);
+    return return_value;
+  }
+
+  LOG(ERROR) << "Unable to read crossystem key " << key;
+  return "";
+}
+
+string HardwareChromeOS::GetHardwareClass() const {
+  if (USE_HWID_OVERRIDE) {
+    return HwidOverride::Read(base::FilePath("/"));
+  }
+  return ReadValueFromCrosSystem("hwid");
+}
+
+string HardwareChromeOS::GetDeviceRequisition() const {
+#if USE_CFM
+  const char* kLocalStatePath = "/home/chronos/Local State";
+  return ReadDeviceRequisition(base::FilePath(kLocalStatePath));
+#else
+  return "";
+#endif
+}
+
+int HardwareChromeOS::GetMinKernelKeyVersion() const {
+  return VbGetSystemPropertyInt("tpm_kernver");
+}
+
+int HardwareChromeOS::GetMaxFirmwareKeyRollforward() const {
+  return VbGetSystemPropertyInt("firmware_max_rollforward");
+}
+
+bool HardwareChromeOS::SetMaxFirmwareKeyRollforward(
+    int firmware_max_rollforward) {
+  // Not all devices have this field yet. So first try to read
+  // it and if there is an error just fail.
+  if (GetMaxFirmwareKeyRollforward() == -1)
+    return false;
+
+  return VbSetSystemPropertyInt("firmware_max_rollforward",
+                                firmware_max_rollforward) == 0;
+}
+
+int HardwareChromeOS::GetMinFirmwareKeyVersion() const {
+  return VbGetSystemPropertyInt("tpm_fwver");
+}
+
+bool HardwareChromeOS::SetMaxKernelKeyRollforward(int kernel_max_rollforward) {
+  return VbSetSystemPropertyInt("kernel_max_rollforward",
+                                kernel_max_rollforward) == 0;
+}
+
+int HardwareChromeOS::GetPowerwashCount() const {
+  int powerwash_count;
+  base::FilePath marker_path =
+      base::FilePath(kPowerwashSafeDirectory).Append(kPowerwashCountMarker);
+  string contents;
+  if (!utils::ReadFile(marker_path.value(), &contents))
+    return -1;
+  base::TrimWhitespaceASCII(contents, base::TRIM_TRAILING, &contents);
+  if (!base::StringToInt(contents, &powerwash_count))
+    return -1;
+  return powerwash_count;
+}
+
+bool HardwareChromeOS::SchedulePowerwash(bool save_rollback_data) {
+  if (save_rollback_data) {
+    if (!utils::WriteFile(kRollbackSaveMarkerFile, nullptr, 0)) {
+      PLOG(ERROR) << "Error in creating rollback save marker file: "
+                  << kRollbackSaveMarkerFile << ". Rollback will not"
+                  << " preserve any data.";
+    } else {
+      LOG(INFO) << "Rollback data save has been scheduled on next shutdown.";
+    }
+  }
+
+  const char* powerwash_command =
+      save_rollback_data ? kRollbackPowerwashCommand : kPowerwashCommand;
+  bool result = utils::WriteFile(
+      kPowerwashMarkerFile, powerwash_command, strlen(powerwash_command));
+  if (result) {
+    LOG(INFO) << "Created " << kPowerwashMarkerFile
+              << " to powerwash on next reboot ("
+              << "save_rollback_data=" << save_rollback_data << ")";
+  } else {
+    PLOG(ERROR) << "Error in creating powerwash marker file: "
+                << kPowerwashMarkerFile;
+  }
+
+  return result;
+}
+
+bool HardwareChromeOS::CancelPowerwash() {
+  bool result = base::DeleteFile(base::FilePath(kPowerwashMarkerFile), false);
+
+  if (result) {
+    LOG(INFO) << "Successfully deleted the powerwash marker file : "
+              << kPowerwashMarkerFile;
+  } else {
+    PLOG(ERROR) << "Could not delete the powerwash marker file : "
+                << kPowerwashMarkerFile;
+  }
+
+  // Delete the rollback save marker file if it existed.
+  if (!base::DeleteFile(base::FilePath(kRollbackSaveMarkerFile), false)) {
+    PLOG(ERROR) << "Could not remove rollback save marker";
+  }
+
+  return result;
+}
+
+bool HardwareChromeOS::GetNonVolatileDirectory(base::FilePath* path) const {
+  *path = base::FilePath(constants::kNonVolatileDirectory);
+  return true;
+}
+
+bool HardwareChromeOS::GetPowerwashSafeDirectory(base::FilePath* path) const {
+  *path = base::FilePath(kPowerwashSafeDirectory);
+  return true;
+}
+
+int64_t HardwareChromeOS::GetBuildTimestamp() const {
+  // TODO(senj): implement this in Chrome OS.
+  return 0;
+}
+
+void HardwareChromeOS::LoadConfig(const string& root_prefix, bool normal_mode) {
+  brillo::KeyValueStore store;
+
+  if (normal_mode) {
+    store.Load(base::FilePath(root_prefix + kConfigFilePath));
+  } else {
+    if (store.Load(base::FilePath(root_prefix + kStatefulPartition +
+                                  kConfigFilePath))) {
+      LOG(INFO) << "UpdateManager Config loaded from stateful partition.";
+    } else {
+      store.Load(base::FilePath(root_prefix + kConfigFilePath));
+    }
+  }
+
+  if (!store.GetBoolean(kConfigOptsIsOOBEEnabled, &is_oobe_enabled_))
+    is_oobe_enabled_ = true;  // Default value.
+}
+
+bool HardwareChromeOS::GetFirstActiveOmahaPingSent() const {
+  string active_ping_str;
+  if (!utils::GetVpdValue(kActivePingKey, &active_ping_str)) {
+    return false;
+  }
+
+  int active_ping;
+  if (active_ping_str.empty() ||
+      !base::StringToInt(active_ping_str, &active_ping)) {
+    LOG(INFO) << "Failed to parse active_ping value: " << active_ping_str;
+    return false;
+  }
+  return static_cast<bool>(active_ping);
+}
+
+bool HardwareChromeOS::SetFirstActiveOmahaPingSent() {
+  int exit_code = 0;
+  string output, error;
+  vector<string> vpd_set_cmd = {
+      "vpd", "-i", "RW_VPD", "-s", string(kActivePingKey) + "=1"};
+  if (!Subprocess::SynchronousExec(vpd_set_cmd, &exit_code, &output, &error) ||
+      exit_code) {
+    LOG(ERROR) << "Failed to set vpd key for " << kActivePingKey
+               << " with exit code: " << exit_code << " with output: " << output
+               << " and error: " << error;
+    return false;
+  } else if (!error.empty()) {
+    LOG(INFO) << "vpd succeeded but with error logs: " << error;
+  }
+
+  vector<string> vpd_dump_cmd = {"dump_vpd_log", "--force"};
+  if (!Subprocess::SynchronousExec(vpd_dump_cmd, &exit_code, &output, &error) ||
+      exit_code) {
+    LOG(ERROR) << "Failed to cache " << kActivePingKey << " using dump_vpd_log"
+               << " with exit code: " << exit_code << " with output: " << output
+               << " and error: " << error;
+    return false;
+  } else if (!error.empty()) {
+    LOG(INFO) << "dump_vpd_log succeeded but with error logs: " << error;
+  }
+  return true;
+}
+
+void HardwareChromeOS::SetWarmReset(bool warm_reset) {}
+
+std::string HardwareChromeOS::GetVersionForLogging(
+    const std::string& partition_name) const {
+  // TODO(zhangkelvin) Implement per-partition timestamp for Chrome OS.
+  return "";
+}
+
+ErrorCode HardwareChromeOS::IsPartitionUpdateValid(
+    const std::string& partition_name, const std::string& new_version) const {
+  // TODO(zhangkelvin) Implement per-partition timestamp for Chrome OS.
+  return ErrorCode::kSuccess;
+}
+
+}  // namespace chromeos_update_engine