Chip input: no margin between chips in multiple lines

[merobal]

Bug, feature request, or proposal:

Bug

What is the expected behavior?

Have margin between chips in multiple lines.

What is the current behavior?

No margin between chips in multiple lines.

What are the steps to reproduce?

https://plnkr.co/edit/KTSz1LYLyD3NH34qLDUW?p=preview

What is the use-case or motivation for changing an existing behavior?

Design.

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

Latest.

Is there anything else we should know?

Caused by #8198
What about adding top margin for all chips (instead of bottom for sibling chips)?
https://plnkr.co/edit/ItBhfqt4WBqMp0dV6lTa?p=preview or https://plnkr.co/edit/iUoyB4rr49Aco3W1I9Ix?p=preview
(The angularjs version also has style margin: 8px 8px 0 0; for all chips.)

[merobal]

@tinayuangao it's still an issue in the final release.

[merobal]

Already solved

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