Move parser helper classes to own files and clean them up.

Move parser helper classes to own files and clean them up.

R=danrubel@google.com

Committed: https://github.com/dart-lang/sdk/commit/3216bda0080532388cdf46ae52944c4a7e760523

[ahe, 2017-07-17 13:51:51]

ahe@google.com changed reviewers:
+ danrubel@google.com, johnniwinther@google.com

[danrubel, 2017-07-17 14:09:24]

LGTM

[ahe, 2017-07-18 10:13:38]

Made a minor tweak before submitting.

https://codereview.chromium.org/2978063002/diff/1/pkg/front_end/lib/src/fasta...
File pkg/front_end/lib/src/fasta/parser/type_continuation.dart (right):

https://codereview.chromium.org/2978063002/diff/1/pkg/front_end/lib/src/fasta...
pkg/front_end/lib/src/fasta/parser/type_continuation.dart:7: import
'../problems.dart' show unhandled;
This import causes the parser to depend on CompilerContext which we don't want
as dart2js relies directly on the parser (without setting up a compiler
context).

[ahe, 2017-07-18 11:02:46]

Description was changed from

==========
Move parser helper classes to own files and clean them up.
==========

to

==========
Move parser helper classes to own files and clean them up.

R=danrubel@google.com

Committed:
https://github.com/dart-lang/sdk/commit/3216bda0080532388cdf46ae52944c4a7e760523
==========

[ahe, 2017-07-18 11:02:47]

Committed patchset #2 (id:20001) manually as
3216bda0080532388cdf46ae52944c4a7e760523 (presubmit successful).