Yeah, it uses the big G logo on the desktop but the proper Chrome eyeball on the taskbar. Can't change it. I installed Chrome with the deb file, BTW.
Shortcuts to websites always have the proper icon.
Edit:
You can change the icon by editing the file in Text Editor. Search for "icon" and change to the path for one you downloaded.
For me:
Icon=/home/tab/Downloads/Chrome-icon.png
The normal method for changing the icon doesn't work, BTW (clicking in the upper left in properties).