How do I remove ugly google chrome icon in the Gnome3 applications tab?

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http://askubuntu.com – When I search in applications of Gnome for Chrome, I get two entries: the left one in the picture is OK with a high resolution icon, the right one has a low resolution icon. I couldn't figure out where the second one is coming from. Does anyone have an idea? I would like to remove it. (HowTos)