Revert of https://codereview.chromium.org/111443009/
Reason for revert: Memory failures reported on bots

TBR=thestig@chromium.org
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/118073002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@241528 0039d316-1c4b-4281-b951-d872f2087c98
Remove metrics_unittests isolate reference for Android.

This should have been done when removing the test in
https://codereview.chromium.org/117293002/

TBR=frankf@chromium.org
BUG=webrtc:1843
NOTRY=True

Review URL: https://codereview.chromium.org/105163004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@241529 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 241529