Revert "Update closure-compiler to v20151015"
Revert "Update closure-compiler to v20151015"

v20151015 crashes with the --language_in=ECMASCRIPT6 option when the input
file paths contain a space (as is apparently the case on the Selenium CI)

This has been reported in google/closure-compiler#1219

This reverts commit 2c0432034859b92d87526b49a06b8854612c864f.

asashour/selenium,titusfortner/selenium,krmahadevan/selenium,davehunt/selenium,Jarob22/selenium,Ardesco/selenium,krmahadevan/selenium,kalyanjvn1/selenium,asolntsev/selenium,asolntsev/selenium,GorK-ChO/selenium,uchida/selenium,joshmgrant/selenium,juangj/selenium,chrisblock/selenium,dibagga/selenium,uchida/selenium,alb-i986/selenium,joshuaduffy/selenium,krmahadevan/selenium,xsyntrex/selenium,joshmgrant/selenium,dibagga/selenium,alb-i986/selenium,xmhubj/selenium,jabbrwcky/selenium,krmahadevan/selenium,twalpole/selenium,anshumanchatterji/selenium,TikhomirovSergey/selenium,bayandin/selenium,lukeis/selenium,actmd/selenium,sag-enorman/selenium,mach6/selenium,GorK-ChO/selenium,joshbruning/selenium,chrisblock/selenium,joshmgrant/selenium,dibagga/selenium,uchida/selenium,Tom-Trumper/selenium,juangj/selenium,titusfortner/selenium,mach6/selenium,alb-i986/selenium,krmahadevan/selenium,xsyntrex/selenium,oddui/selenium,mojwang/selenium,xmhubj/selenium,5hawnknight/selenium,HtmlUnit/selenium,5hawnknight/selenium,joshmgrant/selenium,markodolancic/selenium,davehunt/selenium,SeleniumHQ/selenium,lukeis/selenium,sankha93/selenium,p0deje/selenium,juangj/selenium,alb-i986/selenium,SeleniumHQ/selenium,carlosroh/selenium,kalyanjvn1/selenium,5hawnknight/selenium,valfirst/selenium,Tom-Trumper/selenium,p0deje/selenium,oddui/selenium,oddui/selenium,asolntsev/selenium,xmhubj/selenium,sag-enorman/selenium,tbeadle/selenium,valfirst/selenium,amar-sharma/selenium,tbeadle/selenium,uchida/selenium,kalyanjvn1/selenium,valfirst/selenium,gurayinan/selenium,joshmgrant/selenium,gurayinan/selenium,jsakamoto/selenium,joshbruning/selenium,Tom-Trumper/selenium,titusfortner/selenium,lmtierney/selenium,krmahadevan/selenium,amar-sharma/selenium,lmtierney/selenium,jabbrwcky/selenium,valfirst/selenium,5hawnknight/selenium,davehunt/selenium,amar-sharma/selenium,dibagga/selenium,titusfortner/selenium,juangj/selenium,bayandin/selenium,SeleniumHQ/selenium,gurayinan/selenium,Ardesco/selenium,Ardesco/selenium,valfirst/selenium,mojwang/selenium,mach6/selenium,bayandin/selenium,actmd/selenium,markodolancic/selenium,5hawnknight/selenium,joshbruning/selenium,Dude-X/selenium,actmd/selenium,juangj/selenium,jsakamoto/selenium,juangj/selenium,xsyntrex/selenium,SeleniumHQ/selenium,lukeis/selenium,Jarob22/selenium,Dude-X/selenium,mach6/selenium,mach6/selenium,joshbruning/selenium,oddui/selenium,lmtierney/selenium,jabbrwcky/selenium,oddui/selenium,SeleniumHQ/selenium,Herst/selenium,DrMarcII/selenium,titusfortner/selenium,actmd/selenium,HtmlUnit/selenium,tbeadle/selenium,sag-enorman/selenium,Herst/selenium,oddui/selenium,carlosroh/selenium,DrMarcII/selenium,joshuaduffy/selenium,jabbrwcky/selenium,mojwang/selenium,p0deje/selenium,xsyntrex/selenium,GorK-ChO/selenium,chrisblock/selenium,bayandin/selenium,asashour/selenium,tbeadle/selenium,mojwang/selenium,p0deje/selenium,DrMarcII/selenium,joshmgrant/selenium,p0deje/selenium,jsakamoto/selenium,chrisblock/selenium,alb-i986/selenium,gurayinan/selenium,valfirst/selenium,mach6/selenium,Dude-X/selenium,joshmgrant/selenium,asashour/selenium,Jarob22/selenium,titusfortner/selenium,Herst/selenium,asolntsev/selenium,GorK-ChO/selenium,jsakamoto/selenium,mojwang/selenium,Ardesco/selenium,twalpole/selenium,alb-i986/selenium,xmhubj/selenium,GorK-ChO/selenium,p0deje/selenium,Tom-Trumper/selenium,Jarob22/selenium,mojwang/selenium,anshumanchatterji/selenium,xmhubj/selenium,actmd/selenium,sankha93/selenium,davehunt/selenium,krmahadevan/selenium,actmd/selenium,jabbrwcky/selenium,asashour/selenium,lmtierney/selenium,lukeis/selenium,valfirst/selenium,bayandin/selenium,DrMarcII/selenium,dibagga/selenium,asolntsev/selenium,twalpole/selenium,tbeadle/selenium,5hawnknight/selenium,HtmlUnit/selenium,joshuaduffy/selenium,Jarob22/selenium,markodolancic/selenium,lmtierney/selenium,HtmlUnit/selenium,Herst/selenium,joshuaduffy/selenium,krmahadevan/selenium,HtmlUnit/selenium,juangj/selenium,TikhomirovSergey/selenium,juangj/selenium,bayandin/selenium,asashour/selenium,mojwang/selenium,juangj/selenium,davehunt/selenium,xmhubj/selenium,sankha93/selenium,mach6/selenium,bayandin/selenium,sankha93/selenium,p0deje/selenium,carlosroh/selenium,amar-sharma/selenium,kalyanjvn1/selenium,carlosroh/selenium,joshbruning/selenium,chrisblock/selenium,davehunt/selenium,asolntsev/selenium,bayandin/selenium,Ardesco/selenium,jabbrwcky/selenium,asashour/selenium,chrisblock/selenium,gurayinan/selenium,oddui/selenium,xsyntrex/selenium,Ardesco/selenium,carlosroh/selenium,p0deje/selenium,Jarob22/selenium,5hawnknight/selenium,titusfortner/selenium,sag-enorman/selenium,SeleniumHQ/selenium,joshbruning/selenium,HtmlUnit/selenium,tbeadle/selenium,5hawnknight/selenium,sag-enorman/selenium,kalyanjvn1/selenium,kalyanjvn1/selenium,Jarob22/selenium,twalpole/selenium,lmtierney/selenium,Dude-X/selenium,carlosroh/selenium,xsyntrex/selenium,lmtierney/selenium,alb-i986/selenium,lukeis/selenium,joshuaduffy/selenium,uchida/selenium,xsyntrex/selenium,DrMarcII/selenium,Herst/selenium,carlosroh/selenium,anshumanchatterji/selenium,titusfortner/selenium,joshuaduffy/selenium,GorK-ChO/selenium,markodolancic/selenium,joshmgrant/selenium,GorK-ChO/selenium,twalpole/selenium,jabbrwcky/selenium,lukeis/selenium,asolntsev/selenium,sankha93/selenium,dibagga/selenium,alb-i986/selenium,p0deje/selenium,DrMarcII/selenium,TikhomirovSergey/selenium,alb-i986/selenium,gurayinan/selenium,jsakamoto/selenium,TikhomirovSergey/selenium,TikhomirovSergey/selenium,carlosroh/selenium,uchida/selenium,titusfortner/selenium,joshuaduffy/selenium,markodolancic/selenium,jsakamoto/selenium,markodolancic/selenium,tbeadle/selenium,SeleniumHQ/selenium,sankha93/selenium,Dude-X/selenium,jabbrwcky/selenium,joshmgrant/selenium,amar-sharma/selenium,joshbruning/selenium,joshuaduffy/selenium,davehunt/selenium,joshbruning/selenium,lmtierney/selenium,Tom-Trumper/selenium,SeleniumHQ/selenium,twalpole/selenium,Ardesco/selenium,Herst/selenium,Tom-Trumper/selenium,GorK-ChO/selenium,xmhubj/selenium,joshuaduffy/selenium,oddui/selenium,lukeis/selenium,twalpole/selenium,asashour/selenium,twalpole/selenium,HtmlUnit/selenium,kalyanjvn1/selenium,titusfortner/selenium,anshumanchatterji/selenium,HtmlUnit/selenium,markodolancic/selenium,davehunt/selenium,Dude-X/selenium,chrisblock/selenium,xsyntrex/selenium,TikhomirovSergey/selenium,actmd/selenium,lukeis/selenium,DrMarcII/selenium,tbeadle/selenium,sag-enorman/selenium,sag-enorman/selenium,uchida/selenium,uchida/selenium,anshumanchatterji/selenium,TikhomirovSergey/selenium,bayandin/selenium,dibagga/selenium,joshmgrant/selenium,tbeadle/selenium,valfirst/selenium,asashour/selenium,asolntsev/selenium,lmtierney/selenium,Jarob22/selenium,anshumanchatterji/selenium,Herst/selenium,DrMarcII/selenium,Ardesco/selenium,Tom-Trumper/selenium,dibagga/selenium,SeleniumHQ/selenium,actmd/selenium,sankha93/selenium,jsakamoto/selenium,kalyanjvn1/selenium,sankha93/selenium,Tom-Trumper/selenium,markodolancic/selenium,valfirst/selenium,mach6/selenium,chrisblock/selenium,amar-sharma/selenium,gurayinan/selenium,amar-sharma/selenium,sag-enorman/selenium,Dude-X/selenium,sankha93/selenium,Dude-X/selenium,jsakamoto/selenium,joshbruning/selenium,mojwang/selenium,asolntsev/selenium,oddui/selenium,lukeis/selenium,anshumanchatterji/selenium,SeleniumHQ/selenium,HtmlUnit/selenium,amar-sharma/selenium,TikhomirovSergey/selenium,gurayinan/selenium,amar-sharma/selenium,gurayinan/selenium,markodolancic/selenium,jsakamoto/selenium,valfirst/selenium,mach6/selenium,actmd/selenium,xmhubj/selenium,SeleniumHQ/selenium,Jarob22/selenium,asashour/selenium,DrMarcII/selenium,5hawnknight/selenium,Herst/selenium,uchida/selenium,mojwang/selenium,Tom-Trumper/selenium,sag-enorman/selenium,chrisblock/selenium,Ardesco/selenium,xsyntrex/selenium,titusfortner/selenium,HtmlUnit/selenium,davehunt/selenium,anshumanchatterji/selenium,anshumanchatterji/selenium,kalyanjvn1/selenium,xmhubj/selenium,twalpole/selenium,dibagga/selenium,TikhomirovSergey/selenium,krmahadevan/selenium,Herst/selenium,carlosroh/selenium,valfirst/selenium,Dude-X/selenium,joshmgrant/selenium,jabbrwcky/selenium,GorK-ChO/selenium