Added an internal function to handle `debounce` in demo.
Added an internal function to handle `debounce` in demo.

Please see this [Google Closure compiler PR](https://github.com/google/closure-compiler/pull/1170) for more information/reference.

Basically, the demo code is using `$mdUtil`, which is not part of the public API, and therefore not suitable for the public (docs) reference.

Closes #4888.

bluebirdtech/material,jadjoubran/material,welkinhealth/material,flowersinthesand/material,quietshu/material,hayloft/material,gkalpak/material,miguelcobain/material,bluebirdtech/material,jelbourn/material,n1vlac/material,robertmesserle/material,ilovett/material,hodeyp/material,profoundry-us/material,isaaclyman/material,jelbourn/material,JonFerrera/material,bOOm-X/material,HipsterZipster/material,david-gang/material,BernhardRode/material,bOOm-X/material,daniel-nagy/material,imjoeco/material,kwypchlo/material,dmitriz/material,marekmicek/material,kamilkisiela/material,FrankMeyer/material,n1vlac/material,bOOm-X/material,shyndman/material,Frank3K/material,dkemper01/material,flowersinthesand/material,profoundry-us/material,jadjoubran/material,graingert/material,robertmesserle/material,kamilkisiela/material,flowersinthesand/material,2947721120/angular-material,pwistbac/material,Splaktar/material,quietshu/material,shyndman/material,2947721120/angular-material,gmoothart/material,clshortfuse/material,amithub/Angular-Material-Web-Design,isaaclyman/material,welkinhealth/material,Frank3K/material,FrankMeyer/material,shyndman/material,isaaclyman/material,pwistbac/material,j3ski/material,vertazzar/material,angular/material,SamDLT/material,profoundry-us/material,CarmenPopoviciu/material,acoreyj/material,acoreyj/material,robertmesserle/material,marekmicek/material,imjoeco/material,ServiceManagementGroup/material,franzsilva/material,Todd-Werelius/material,ilovett/material,BernhardRode/material,j3ski/material,hodeyp/material,colinskow/material,j3ski/material,epelc/material,flowersinthesand/material,DevVersion/material,Splaktar/material,DevVersion/material,Todd-Werelius/material,amithub/Angular-Material-Web-Design,vertazzar/material,pwistbac/material,graingert/material,hodeyp/material,JonFerrera/material,amithub/Angular-Material-Web-Design,clshortfuse/material,dkemper01/material,miguelcobain/material,dmitriz/material,marekmicek/material,david-gang/material,oostmeijer/material,2947721120/angular-material,acoreyj/material,clshortfuse/material,robertmesserle/material,dmitriz/material,programmist/material,franzsilva/material,2947721120/angular-material,oostmeijer/material,programmist/material,hayloft/material,ilovett/material,ErinCoughlan/material,kwypchlo/material,vertazzar/material,ErinCoughlan/material,angular/material,DevVersion/material,SamDLT/material,JonFerrera/material,pwistbac/material,gkalpak/material,Todd-Werelius/material,gmoothart/material,imjoeco/material,gmoothart/material,marekmicek/material,dkemper01/material,franzsilva/material,DevVersion/material,gkalpak/material,graingert/material,FrankMeyer/material,CarmenPopoviciu/material,HarrisCorp/material,DerekLouie/material,ServiceManagementGroup/material,Frank3K/material,BernhardRode/material,graingert/material,ErinCoughlan/material,HipsterZipster/material,kamilkisiela/material,oostmeijer/material,bluebirdtech/material,hodeyp/material,hayloft/material,daniel-nagy/material,HarrisCorp/material,JonFerrera/material,jadjoubran/material,CarmenPopoviciu/material,epelc/material,quietshu/material,david-gang/material,shyndman/material,angular/material,Todd-Werelius/material,epelc/material,colinskow/material,epelc/material,welkinhealth/material,bluebirdtech/material,quietshu/material,gkalpak/material,Splaktar/material,clshortfuse/material,Frank3K/material,n1vlac/material,DerekLouie/material,programmist/material,jadjoubran/material,profoundry-us/material,angular/material,jelbourn/material,crisbeto/material,FrankMeyer/material,gmoothart/material,ErinCoughlan/material,HarrisCorp/material,dkemper01/material,programmist/material,kamilkisiela/material,david-gang/material,daniel-nagy/material,ilovett/material,imjoeco/material,franzsilva/material,DerekLouie/material,miguelcobain/material,ServiceManagementGroup/material,dmitriz/material,oostmeijer/material,crisbeto/material,vertazzar/material,HipsterZipster/material,crisbeto/material,colinskow/material,hayloft/material,kwypchlo/material,acoreyj/material,crisbeto/material,bOOm-X/material,HarrisCorp/material,jelbourn/material,SamDLT/material,isaaclyman/material,amithub/Angular-Material-Web-Design,HipsterZipster/material,kwypchlo/material,welkinhealth/material,Splaktar/material,SamDLT/material,n1vlac/material,ServiceManagementGroup/material,daniel-nagy/material,CarmenPopoviciu/material,DerekLouie/material,BernhardRode/material,j3ski/material,miguelcobain/material,colinskow/material