I assume you mean that the Google-Chrome icon isn't in the menu. On my install the Google-Chrome icon wasn't in the "Internet" menu file, it was under "Other". If its there, its easy enough to move. Right click on the menu icon, select edit menu, , click on the "Other" file, find Google-Chrome and drag it to the Internet file. If the icon isn't in the "Other" file (or any other file), then check to see if there is an icon in /use/bin. If its there, right click on the menu, select edit, select new item. Put in the name, then under command, browse to /usr/bin and select Google-Chrome.
On my installations, Google-Chrome is also in /opt so you can use that file instead.