Allow re-enrollment to the same domain in case of policy data loss.

chrome/browser/policy/enterprise_install_attributes.cc

Index: chrome/browser/policy/enterprise_install_attributes.cc
diff --git a/chrome/browser/policy/enterprise_install_attributes.cc b/chrome/browser/policy/enterprise_install_attributes.cc
index bb6f9f2ba3fed2fb186b9ae08f70c00476d920d6..10e826fb8fbe45645c4b91735906e2fead65ec1a 100644
--- a/chrome/browser/policy/enterprise_install_attributes.cc
+++ b/chrome/browser/policy/enterprise_install_attributes.cc
@@ -6,6 +6,7 @@
 
 #include "base/logging.h"
 #include "chrome/browser/chromeos/cros/cryptohome_library.h"
+#include "chrome/browser/chromeos/login/authenticator.h"
 
 namespace policy {
 
@@ -23,16 +24,6 @@ const char kAttrEnterpriseMode[] = "enterprise.mode";
 const char kAttrEnterpriseOwned[] = "enterprise.owned";
 const char kAttrEnterpriseUser[] = "enterprise.user";
 
-// Extract the domain from a given email.
-std::string ExtractDomainName(const std::string& email) {
-  size_t separator_pos = email.find('@');
-  if (separator_pos != email.npos && separator_pos < email.length() - 1)
-    return email.substr(separator_pos + 1);
-  else
-    NOTREACHED() << "Not a proper email address: " << email;
-  return std::string();
-}
-
 // Translates DeviceMode constants to strings used in the lockbox.
 std::string GetDeviceModeString(DeviceMode mode) {
   switch (mode) {
@@ -78,9 +69,11 @@ EnterpriseInstallAttributes::LockResult EnterpriseInstallAttributes::LockDevice(
   CHECK_NE(device_mode, DEVICE_MODE_PENDING);
   CHECK_NE(device_mode, DEVICE_MODE_NOT_SET);
 
+  std::string domain = chromeos::Authenticator::ExtractDomainName(user);
+
   // Check for existing lock first.
   if (device_locked_) {
-    return !registration_user_.empty() && user == registration_user_ ?
+    return !registration_domain_.empty() && domain == registration_domain_ ?
         LOCK_SUCCESS : LOCK_WRONG_USER;
   }
 
@@ -103,7 +96,6 @@ EnterpriseInstallAttributes::LockResult EnterpriseInstallAttributes::LockDevice(
   if (!cryptohome_->InstallAttributesIsFirstInstall())
     return LOCK_WRONG_USER;
 
-  std::string domain = ExtractDomainName(user);
   std::string mode = GetDeviceModeString(device_mode);
 
   // Set values in the InstallAttrs and lock it.
@@ -188,7 +180,8 @@ void EnterpriseInstallAttributes::ReadImmutableAttributes() {
         // pre 19 revisions of the code, before these new attributes were added.
         if (!cryptohome_->InstallAttributesGet(kAttrEnterpriseDomain,
                                                &registration_domain_)) {
-          registration_domain_ = ExtractDomainName(registration_user_);
+          registration_domain_ =
+              chromeos::Authenticator::ExtractDomainName(registration_user_);
         }
         if (!cryptohome_->InstallAttributesGet(kAttrEnterpriseDeviceId,
                                                &registration_device_id_)) {