I´ve just installed elementary OS Loki, and downloaded and installed Google Chrome from their website. When I turn off my computer, and restart, Google Chrome don't remember any password, not even the sync one. So I have to manually reenter my account. How I can fix it?
Setting this keyring to blank should let it do its thing without bothering you. If you have already set it up, trash your keyring and restart Chrome to receive the fresh prompt, where you can set it to not use a password.
Check the following locations for the keychain (remember to save a copy as backup first):
More elaboration and links at my Unix SE post.
I was having a problem once where I changed my user account password and then my key-chain popped up when I logged into the system, or launched chrome. You just need to put in your original key-chain password if this is what is happening to you. If it's not then you could always manually go in and change your key-chain password so that it automatically saves your data.
Another, easier, way around this is to log into google chrome using your google account and download lastpass password manager and that can act as your online key-chain.
This has to do with online accounts in System Settings. In Ubuntu this is easy to fix. Just add Google as an online account in "System settings -> Online accounts" and the sync problem (login every reboot) will go away.
However in elementary OS, you cannot add a Google account in Online accounts (hopefully, at least not yet) in System Settings. So for now there seems to be no fix for this (or if it is possible to add the same Online accounts in Ubuntu to elementary OS then there's a chance.)
Also one of the reasons this is happening is if you have auto login enabled when logging in to your PC. Disabling it (entering your password every time you login) will solve this issue.