Add type inference for break and continue statements.

Add type inference for break and continue statements.

Note that no actual type inference needs to be performed, but we still
need to implement the _inferStatement() methods so that we can get rid
of the hack in KernelTypeInferrer.inferStatement.  Also, we need to
call into the listener so that once this logic is hooked into
AstBuilder, analyzer will stay in sync with type inference.

R=scheglov@google.com

Committed: https://github.com/dart-lang/sdk/commit/2f7c6d61f516c1a6df55eba065375854f4723c7c

[Paul Berry, 2017-06-26 20:23:32]

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

[scheglov, 2017-06-26 20:30:05]

LGTM

[Paul Berry, 2017-06-26 21:51:11]

Description was changed from

==========
Add type inference for break and continue statements.

Note that no actual type inference needs to be performed, but we still
need to implement the _inferStatement() methods so that we can get rid
of the hack in KernelTypeInferrer.inferStatement.  Also, we need to
call into the listener so that once this logic is hooked into
AstBuilder, analyzer will stay in sync with type inference.
==========

to

==========
Add type inference for break and continue statements.

Note that no actual type inference needs to be performed, but we still
need to implement the _inferStatement() methods so that we can get rid
of the hack in KernelTypeInferrer.inferStatement.  Also, we need to
call into the listener so that once this logic is hooked into
AstBuilder, analyzer will stay in sync with type inference.

R=scheglov@google.com

Committed:
https://github.com/dart-lang/sdk/commit/2f7c6d61f516c1a6df55eba065375854f4723c7c
==========

[Paul Berry, 2017-06-26 21:51:12]

Committed patchset #1 (id:1) manually as
2f7c6d61f516c1a6df55eba065375854f4723c7c (presubmit successful).