DeviceSettingsProvider's write path uses OwnerSettingsService now.

components/ownership/owner_settings_service.h

Index: components/ownership/owner_settings_service.h
diff --git a/components/ownership/owner_settings_service.h b/components/ownership/owner_settings_service.h
index a642bf2870524200562d21c4d80ef95dbdb0b859..16a79e6e9d41faa4934e19e407d4a232f12c59b1 100644
--- a/components/ownership/owner_settings_service.h
+++ b/components/ownership/owner_settings_service.h
@@ -87,6 +87,12 @@ class OWNERSHIP_EXPORT OwnerSettingsService : public KeyedService {
   // Sets |setting| value to |value|.
   virtual bool Set(const std::string& setting, const base::Value& value) = 0;
 
+  // Sets a bunch of device settings accumulated before ownership gets
+  // established.
+  // Note that this is a temporary solution and should be removed soon.
+  virtual bool CommitTentativeDeviceSettings(
+      scoped_ptr<enterprise_management::PolicyData> policy) = 0;
+
   bool SetBoolean(const std::string& setting, bool value);
   bool SetInteger(const std::string& setting, int value);
   bool SetDouble(const std::string& setting, double value);