Read CrOS install attributes cache on startup.

chrome/browser/policy/enterprise_install_attributes.h

 // 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.
 
 #ifndef CHROME_BROWSER_POLICY_ENTERPRISE_INSTALL_ATTRIBUTES_H_
 #define CHROME_BROWSER_POLICY_ENTERPRISE_INSTALL_ATTRIBUTES_H_
 
+#include <map>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
+#include "base/file_path.h"
 #include "chrome/browser/policy/cloud_policy_constants.h"
 
 namespace chromeos {
 class CryptohomeLibrary;
 }
 
 namespace policy {
 
 // Brokers access to the enterprise-related installation-time attributes on
 // ChromeOS.
 class EnterpriseInstallAttributes {
  public:
   // Return codes for LockDevice().
   enum LockResult {
     LOCK_SUCCESS,
     LOCK_NOT_READY,
     LOCK_BACKEND_ERROR,
     LOCK_WRONG_USER,
   };
 
+  // Standard cache file name.
+  static const FilePath::CharType kCacheFilePath[];
+
   explicit EnterpriseInstallAttributes(chromeos::CryptohomeLibrary* cryptohome);
 
+  // Reads data from the cache file. The cache file is used to work around slow
+  // cryptohome startup, which takes a while to register its DBus interface.
+  // See http://crosbug.com/37367 for background on this.
+  void ReadCacheFile(const FilePath& cache_file);
+
+  // Makes sure the local caches for enterprise-related install attributes are
+  // up-to-date with what cryptohome has.
+  void ReadImmutableAttributes();
+
   // Locks the device to be an enterprise device registered by the given user.
   // This can also be called after the lock has already been taken, in which
   // case it checks that the passed user agrees with the locked attribute.
   LockResult LockDevice(const std::string& user,
                         DeviceMode device_mode,
                         const std::string& device_id) WARN_UNUSED_RESULT;
 
   // Checks whether this is an enterprise device.
   bool IsEnterpriseDevice();
 
   // Gets the domain this device belongs to or an empty string if the device is
   // not an enterprise device.
   std::string GetDomain();
 
   // Gets the user that registered the device. Returns an empty string if the
   // device is not an enterprise device.
   std::string GetRegistrationUser();
 
   // Gets the device id that was generated when the device was registered.
   // Returns an empty string if the device is not an enterprise device or the
   // device id was not stored in the lockbox (prior to R19).
   std::string GetDeviceId();
 
   // Gets the mode the device was enrolled to. The return value for devices that
   // are not locked yet will be DEVICE_MODE_UNKNOWN.
   DeviceMode GetMode();
 
  private:
-  // Makes sure the local caches for enterprise-related install attributes are
-  // up-to-date with what cryptohome has.
-  void ReadImmutableAttributes();
+  // Decodes the install attributes provided in |attr_map|.
+  void DecodeInstallAttributes(
+      const std::map<std::string, std::string>& attr_map);
 
   chromeos::CryptohomeLibrary* cryptohome_;
 
   bool device_locked_;
   std::string registration_user_;
   std::string registration_domain_;
   std::string registration_device_id_;
   DeviceMode registration_mode_;
 
   DISALLOW_COPY_AND_ASSIGN(EnterpriseInstallAttributes);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_ENTERPRISE_INSTALL_ATTRIBUTES_H_