Fix erroneous restoration of task model state.

Fix erroneous restoration of task model state.

The test suite PoorMansIncrementalResolutionTest was turning on the
new task model during setup and turning it off during teardown; as a
result, any tests run after it were using the old task model.

The easy fix is to just stop trying to adjust the task model state in
this test suite, since the new task model is on by default now.

This should fix test breakages when run via pkg/analyzer/test_all.dart.

TBR=scheglov@google.com

Committed: https://github.com/dart-lang/sdk/commit/c030056158b1e190eb806b175e844af38e6f8dcd

[Paul Berry, 2015-12-02 19:41:18]

Description was changed from

==========
Fix erroneous restoration of task model state.

The test suite PoorMansIncrementalResolutionTest was turning on the
new task model during setup and turning it off during teardown; as a
result, any tests run after it were using the old task model.

The easy fix is to just stop trying to adjust the task model state in
this test suite, since the new task model is on by default now.

This should fix test breakages when run via pkg/analyzer/test_all.dart.

TBR=scheglov@google.com
==========

to

==========
Fix erroneous restoration of task model state.

The test suite PoorMansIncrementalResolutionTest was turning on the
new task model during setup and turning it off during teardown; as a
result, any tests run after it were using the old task model.

The easy fix is to just stop trying to adjust the task model state in
this test suite, since the new task model is on by default now.

This should fix test breakages when run via pkg/analyzer/test_all.dart.

TBR=scheglov@google.com

Committed:
https://github.com/dart-lang/sdk/commit/c030056158b1e190eb806b175e844af38e6f8dcd
==========

[Paul Berry, 2015-12-02 19:41:19]

Committed patchset #1 (id:1) manually as
c030056158b1e190eb806b175e844af38e6f8dcd (presubmit successful).

[scheglov, 2015-12-02 19:46:54]

LGTM