Google Chrome provides users with option for restoring the previous session during the startup. This feature can be enabled using the Google Chrome Options.
Click the wrench icon and select options from the list of available menus.
In the Google Chrome options screen under the Basics tab navigate to On startup section.
From the list of radio option available for On startup, select Reopen the pages that were open last. This would always restore the previously open web pages during the startup of Google Chrome.