fix #43, remove => workaround

fix #43, remove => workaround
also fixes node.js test to use a temp directory, instead of creating "tmp" under dev_compiler checkout

R=vsm@google.com

Committed: https://github.com/dart-lang/dev_compiler/commit/22e01a24224ee0af2a1bd937570f3f9dd6e2f83d

[Jennifer Messerly, 2016-01-29 23:25:34]

jmesserly@google.com changed reviewers:
+ vsm@google.com

[vsm, 2016-01-30 00:44:41]

On 2016/01/29 23:25:35, John Messerly wrote:

Atom is still on Chrome 45.  Do you know if that's new enough?

[Jennifer Messerly, 2016-02-01 19:32:44]

On 2016/01/30 00:44:41, vsm wrote:
> On 2016/01/29 23:25:35, John Messerly wrote:
> 
> Atom is still on Chrome 45.  Do you know if that's new enough?

We're testing Atom right? So if tests pass, we should be good?

This bug was fixed ages ago in Chrome. I removed the workaround once already,
back in June 2015(!!
https://github.com/dart-lang/dev_compiler/commit/19f6daf59b49e425961b01e34ebd...).
We restored it to help out with node.js, only because node.js was on an ancient
V8 version.

[Jennifer Messerly, 2016-02-01 20:07:39]

On 2016/02/01 19:32:44, John Messerly wrote:
> On 2016/01/30 00:44:41, vsm wrote:
> > On 2016/01/29 23:25:35, John Messerly wrote:
> > 
> > Atom is still on Chrome 45.  Do you know if that's new enough?
> 
> We're testing Atom right? So if tests pass, we should be good?
> 
> This bug was fixed ages ago in Chrome. I removed the workaround once already,
> back in June 2015(!!
>
https://github.com/dart-lang/dev_compiler/commit/19f6daf59b49e425961b01e34ebd...).
> We restored it to help out with node.js, only because node.js was on an
ancient
> V8 version.

Tested in Atom 1.4.0 console:

var C = (function() { 'use strict'; class C { constructor(x) { this.x = x; } m()
{ return () => this.x; } }; return C; })();
new C(42).m()();
--> 42

[vsm, 2016-02-01 20:31:09]

lgtm

[Jennifer Messerly, 2016-02-01 20:55:01]

Description was changed from

==========
fix #43, remove => workaround
also fixes node.js test to use a temp directory, instead of creating "tmp" under
dev_compiler checkout
==========

to

==========
fix #43, remove => workaround
also fixes node.js test to use a temp directory, instead of creating "tmp" under
dev_compiler checkout

R=vsm@google.com

Committed:
https://github.com/dart-lang/dev_compiler/commit/22e01a24224ee0af2a1bd937570f...
==========

[Jennifer Messerly, 2016-02-01 20:55:01]

Committed patchset #1 (id:1) manually as
22e01a24224ee0af2a1bd937570f3f9dd6e2f83d (presubmit successful).