Cleanup change.

Cleanup change.
AssertAssignableInstr::Canonicalize was too restrictive: it can instantiate the
type even if the instantiator is null.
Do not allocate empty TypeArguments handles, but use the common one instead.

R=fschneider@google.com

Committed: https://github.com/dart-lang/sdk/commit/bde22d2dee87eebd1b7cb4afc3280777b5868aef

[regis, 2017-03-21 20:49:16]

regis@google.com changed reviewers:
+ fschneider@google.com

[Florian Schneider, 2017-03-21 20:52:41]

Lgtm

[regis, 2017-03-21 20:55:45]

Description was changed from

==========
Cleanup change.
AssertAssignableInstr::Canonicalize was too restrictive: it can instantiate the
type even if the instantiator is null.
Do not allocate empty TypeArguments handles, but use the common one instead.
==========

to

==========
Cleanup change.
AssertAssignableInstr::Canonicalize was too restrictive: it can instantiate the
type even if the instantiator is null.
Do not allocate empty TypeArguments handles, but use the common one instead.

R=fschneider@google.com

Committed:
https://github.com/dart-lang/sdk/commit/bde22d2dee87eebd1b7cb4afc3280777b5868aef
==========

[regis, 2017-03-21 20:55:46]

Committed patchset #1 (id:1) manually as
bde22d2dee87eebd1b7cb4afc3280777b5868aef (presubmit successful).