Disable/enable echo for enterprise device.

chrome/browser/chromeos/settings/device_settings_provider.cc

Index: chrome/browser/chromeos/settings/device_settings_provider.cc
diff --git a/chrome/browser/chromeos/settings/device_settings_provider.cc b/chrome/browser/chromeos/settings/device_settings_provider.cc
index f60f5445fc60662b41b5d35e859f25362091d5d2..f58d4b201397092e0018c0cef759538964f729d4 100644
--- a/chrome/browser/chromeos/settings/device_settings_provider.cc
+++ b/chrome/browser/chromeos/settings/device_settings_provider.cc
@@ -44,6 +44,7 @@ const char* kKnownSettings[] = {
   kAccountsPrefShowUserNamesOnSignIn,
   kAccountsPrefUsers,
   kAccountsPrefDeviceLocalAccounts,
+  kAllowRedeemChromeOsRegistrationOffers,
   kAppPack,
   kDeviceOwner,
   kIdleLogoutTimeout,
@@ -290,6 +291,16 @@ void DeviceSettingsProvider::SetInPolicy() {
     } else {
       NOTREACHED();
     }
+  } else if (prop == kAllowRedeemChromeOsRegistrationOffers) {
+    em::AllowRedeemChromeOsRegistrationOffersProto* allow_redeem_offers =
+        device_settings_.mutable_allow_redeem_offers();
+    bool allow_redeem_offers_value = true;
+    if (value->GetAsBoolean(&allow_redeem_offers_value)) {
+      allow_redeem_offers->set_allow_redeem_offers(
+          allow_redeem_offers_value);
+    } else {
+      NOTREACHED();
+    }
   } else {
     // The remaining settings don't support Set(), since they are not
     // intended to be customizable by the user:
@@ -536,6 +547,16 @@ void DeviceSettingsProvider::DecodeGenericPolicies(
           policy.system_timezone().timezone());
     }
   }
+
+  if (policy.has_allow_redeem_offers()) {
+    new_values_cache->SetBoolean(
+        kAllowRedeemChromeOsRegistrationOffers,
+        policy.allow_redeem_offers().allow_redeem_offers());
+  } else {
+    new_values_cache->SetBoolean(
+        kAllowRedeemChromeOsRegistrationOffers,
+        true);
+  }
 }
 
 void DeviceSettingsProvider::UpdateValuesCache(