Revert 227569 "[Activity Log] Enable win debug tests."

RED :(

> [Activity Log] Enable win debug tests.
> 
> Flakiness was fixed on crbug.com/300013. Enable tests on all windows builds.
> 
> BUG=299393
> 
> Review URL: https://codereview.chromium.org/26302002

TBR=karenlees@chromium.org

Review URL: https://codereview.chromium.org/26165006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227626 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227626