Revert 244210 "Include external touchscreen vid/pid in UMA hardw..."

Trying to get the cros asan bot green (crbug.com/333571)

> Include external touchscreen vid/pid in UMA hardware profile
> 
> Previously we looked at including the touchscreen name in the UMA
> hardware profile: https://codereview.chromium.org/23619085/.
> 
> As that posed a privacy concern, this patch includes the vid/pid
> instead.
> 
> BUG=248910
> 
> Review URL: https://codereview.chromium.org/103893005

TBR=tdresser@chromium.org

Review URL: https://codereview.chromium.org/135763002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244378 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 244378