Revert 267314 "Add LogoTracker to fetch search providers' logos."
> Add LogoTracker to fetch search providers' logos.
>
> The LogoTracker keeps track of the logo for a search provider. The logo
> is downloaded, cached on disk, and periodically revalidated.
>
> This code lives inside a component (search_provider_logos) so it can be
> used on both Android and iOS.
>
> BUG=178922
> NOTRY=true
>
> Review URL: https://codereview.chromium.org/
162373002
TBR=newt@chromium.org
Review URL: https://codereview.chromium.org/
257363005
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@267319 0039d316-1c4b-4281-b951-d872f2087c98