Add the ability to select a subset of tests using "...".

Add the ability to select a subset of tests using "...".

For example, the following command:

    pkg/front_end/tool/fasta testing compile/type...

Now runs all tests in the "compile" suite whose name begins with
"type".

R=ahe@google.com

Committed: https://github.com/dart-lang/sdk/commit/84ef5ed2da6a2cd4700f29ee4a80666a13cb534e

[Paul Berry, 2017-04-19 08:38:06]

paulberry@google.com changed reviewers:
+ ahe@google.com

[ahe, 2017-04-19 08:44:56]

lgtm

[Paul Berry, 2017-04-19 08:45:39]

Description was changed from

==========
Add the ability to select a subset of tests using "...".

For example, the following command:

    pkg/front_end/tool/fasta testing compile/type...

Now runs all tests in the "compile" suite whose name begins with
"type".
==========

to

==========
Add the ability to select a subset of tests using "...".

For example, the following command:

    pkg/front_end/tool/fasta testing compile/type...

Now runs all tests in the "compile" suite whose name begins with
"type".

R=ahe@google.com

Committed:
https://github.com/dart-lang/sdk/commit/84ef5ed2da6a2cd4700f29ee4a80666a13cb534e
==========

[Paul Berry, 2017-04-19 08:45:42]

Committed patchset #1 (id:1) manually as
84ef5ed2da6a2cd4700f29ee4a80666a13cb534e (presubmit successful).