Improved file api feature detection.
Improved file api feature detection.

ikuchmin/tinymce,M4R7iNP/tinymce,tinymce/tinymce,henrythewasp/tinymce,jtark/tinymce,dziemian007/tinymce,nikolas/tinymce,fhchina/tinymce,1099511627776/tinymce,VioletLife/tinymce,blakewallan/tinymce,FernCreek/tinymce,adaptiffdesigns/tinymce,fillabs/TinySpecMCE,endjin/tinymce,adaptiffdesigns/tinymce,rbecheras/tinymce,howanghk/tinymce,Razzwan/tinymce,gabixdev/tinymce,danchr/tinymce,MediehusetTek/tinymce,jashua212/tinymce,nbcp/tinymce,nikolas/tinymce,ETSI-CTI/TinySpecMCE,shilpi230/tinymce,ikuchmin/tinymce,bsuh/tinymce,rbecheras/tinymce,FernCreek/tinymce,shilpi230/tinymce,gabixdev/tinymce,dziemian007/tinymce,fhchina/tinymce,sachgits/tinymce,leofeyer/tinymce,jtark/tinymce,gencer/tinymce,kencheung/tinymce,sjbufton/tinymce,rednose-public/tinymce,MediehusetTek/tinymce,bsuh/tinymce,enfold/tinymce,leofeyer/tinymce,Zimbra/tinymce,pmpl-5/tinymce,TeamupCom/tinymce,1099511627776/tinymce,simachewh/tinymce,ETSI-CTI/TinySpecMCE,simachewh/tinymce,fashionsun/tinymce,tinymce/tinymce,tinymce/tinymce,endjin/tinymce,rednose-public/tinymce,fashionsun/tinymce,gencer/tinymce,VioletLife/tinymce,rxl194/tinymce,aduth/tinymce,howanghk/tinymce,fillabs/TinySpecMCE,jashua212/tinymce,support-dot-com/tinymce,aduth/tinymce,danielpunkass/tinymce,nbcp/tinymce,sachgits/tinymce,danchr/tinymce,rxl194/tinymce,FernCreek/tinymce,kencheung/tinymce,sjbufton/tinymce,Razzwan/tinymce,TeamupCom/tinymce,support-dot-com/tinymce,henrythewasp/tinymce,blakewallan/tinymce,M4R7iNP/tinymce,danielpunkass/tinymce,enfold/tinymce,pmpl-5/tinymce,Zimbra/tinymce,danielpunkass/tinymce