Revert of git cl try: don't skip presubmit builders, but set dry_run property. (patchset #2 id:20001 of https://codereview.chromium.org/1926663002/ )

Reason for revert:
Now only presubmit is scheduled on dry run, example CL:
https://codereview.chromium.org/1804003002

Original issue's description:
> Reland of git cl try: don't skip presubmit builders, but set dry_run property.
> 
> With a fix: actually set dry_run for presubmit, and don't set it for other builders.
> 
> R=machenbach@chromium.org,sergiyb@chromium.org
> BUG=601128,594127,591030
> 
> Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=300295

TBR=sergiyb@chromium.org,tandrii@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=601128,594127,591030

Review-Url: https://codereview.chromium.org/1928373002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@300337 0039d316-1c4b-4281-b951-d872f2087c98