Click indeterminate checkbox on IE doesn't trigger toggle event

[tinayuangao]

Bug, feature request, or proposal:

Bug

What is the expected behavior?

When the checkbox is indeterminate state, clicking on the checkbox should trigger toggle event and change the checkbox's checked status.

What is the current behavior?

The first click doesn't work. User need to click on the checkbox twice to trigger toggle.

What are the steps to reproduce?

Visit material2-dev.firebaseapp.com
Click 'Toggle Indeterminate'
Click on the checkbox (the checked value should change from Maybe! to Yes!, but it didn't)
Click on the cehckbox again (checked became Yes!)

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Plunker template: http://plnkr.co/edit/o077B6uEiiIgkC0S06dd

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

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

IE on Surface

Is there anything else we should know?

[angular-automatic-lock-bot]

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