Exclude expensive tests on win_chromium_x64_rel to make it cycle faster

This depends on https://codereview.chromium.org/243003002/

BUG=364819
R=mmoss@google.com

Review URL: https://codereview.chromium.org/243053002

git-svn-id: http://src.chromium.org/chrome/trunk/src/testing@264788 4ff67af0-8c30-449e-8e8b-ad334ec8d88c