mdChips : Autocomplete input display 'true' before entered the first time.

[waegen]

When creating a chips autocomplete component the first time the component is displayed but not entered (focused) the text 'true' is displayed instead of the placeholder.

See here: http://plnkr.co/edit/7zzPBLuPdxvgFveYl1s9?p=preview

Once the input area got focus the real placeholder is displayed.

Version: v0.9.0-rc2-master-a5c972f
Browsers: Chrome, IE, FF

[TalPasi]

The problem it if md-search-text is not initialized in the vm first,

setting vm.searchText = null will resolve the problem, but this is not the desired solution

http://plnkr.co/edit/Xe8FWggIqhB5XaRpgfPE?p=preview

[ThomasBurleson]

Duplicate of #2515