VM: Fix _CompactLinkedHashSet performance regression.

VM: Fix _CompactLinkedHashSet performance regression.

Directly initializing field helps the VM figure out that they cannot be null.

R=fschneider@google.com

Committed: https://github.com/dart-lang/sdk/commit/83e73400dba98fc21c4ea58da1869a385efa669f

[sra1, 2016-03-26 17:46:40]

Description was changed from

==========
Fix _CompactLinkedHashSet performance regression.

Making sure the fields are initialized lets the VM figure out that they cannot
be null.
==========

to

==========
VM: Fix _CompactLinkedHashSet performance regression.

Directly initializing helps the VM figure out that they cannot be null.
==========

[sra1, 2016-03-26 17:46:40]

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

[sra1, 2016-03-26 17:47:03]

Description was changed from

==========
VM: Fix _CompactLinkedHashSet performance regression.

Directly initializing helps the VM figure out that they cannot be null.
==========

to

==========
VM: Fix _CompactLinkedHashSet performance regression.

Directly initializing field helps the VM figure out that they cannot be null.
==========

[Florian Schneider, 2016-03-26 19:17:04]

LGTM

[sra1, 2016-03-28 14:44:13]

Description was changed from

==========
VM: Fix _CompactLinkedHashSet performance regression.

Directly initializing field helps the VM figure out that they cannot be null.
==========

to

==========
VM: Fix _CompactLinkedHashSet performance regression.

Directly initializing field helps the VM figure out that they cannot be null.

R=fschneider@google.com

Committed:
https://github.com/dart-lang/sdk/commit/83e73400dba98fc21c4ea58da1869a385efa669f
==========

[sra1, 2016-03-28 14:44:14]

Committed patchset #2 (id:20001) manually as
83e73400dba98fc21c4ea58da1869a385efa669f (presubmit successful).