chips: removing a chip is not causing validators to run ($dirty, $pristine not update)

[jai-git-dev]

Bug, enhancement request, or proposal:

CodePen and steps to reproduce the issue:

CodePen Demo which demonstrates the issue:

Detailed Reproduction Steps:

1. Create a form with md-chips having a value.
2. Now try to remove that chip. Look for its pristine. It should actually get false but now its not getting affected on removing it.

What is the expected behavior?

form $pristine should become false on removing a chip.

What is the current behavior?

form $pristine value is not getting affected on removing a chip.

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

Which versions of AngularJS, Material, OS, and browsers are affected?

• AngularJS:
• AngularJS Material: 1.1.10
• OS: Linux/Mac
• Browsers:Chrome

Is there anything else we should know? Stack Traces, Screenshots, etc.

• AngularJS Material: 1.1.9 working ,but the above issue only in 1.1.10 version
  https://codepen.io/jayapal92/pen/eKorPe

[Splaktar]

Thank you for the bug report! I can reproduce this. It's affecting $dirty as well. I simplified the CodePen a little and do also see that it worked in 1.1.9. I'm working on adding a unit test for this now.