the security of the Chrome saved passwords depends totally on the user:

• Use a very strong Windows account password. Keep in mind, there are utilities which can decipher Windows passwords. If someone gets your Windows account password then they have access to your saved browser passwords.
• Protect yourself from malware. If utilities are able to easily access your saved passwords, why can’t malware?
• Save your passwords in a password management system such as KeePass. Of course, you loose the convenience of having the browser auto-fill your passwords.
• Use a 3rd party utility which integrates with Chrome and uses a master password to manage your passwords.