how to combine several gmail accounts into one?

[brannsiu]

Hi I have a couple of gmail accounts registered over the years and some of them works with Chrome and has saved bookmarks, history, cache etc..... I 'd like to transfer all data from these accounts into one for better management. What could I do?? I have already set to forward all mails to a particular account but I don't know how to do the rest. Wish there would be some help. Thank you

 

[brannsiu]

any ideas?