Convert the VM running Heartbeat as a multi (20) buildslave.
Convert the VM running Heartbeat as a multi (20) buildslave.

This will permit running all the heartbeats event during slowdown.

R=vadimsh@chromium.org
BUG=

Review URL: https://codereview.chromium.org/698953004

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@292812 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build