If you are Uninstalling your Google Chrome All your History, Saved Passwords, Download history and Bookmarks will be deleted. One of the most important thing we use in Google Chrome is Bookmarks There is a simple way to backup all your Google Chrome bookmarks.
You can make a backup of your bookmarks by going to Wrench >Bookmarks> Bookmark manager > Organize > Export bookmarks
If you want to restore all your bookmarks just click Wrench >Bookmarks> Bookmark manager > Organize > Import bookmarks.
Now, Select the HTML file you want to import and click OK. Now, you will see a new Tab in the in the Bookmark Bar named Imported