[fix bug 1303076] Fix plugincheck to avoid enumerating on navigator.mimeTypes
[fix bug 1303076] Fix plugincheck to avoid enumerating on navigator.mimeTypes

glogiotatidis/bedrock,mozilla/bedrock,craigcook/bedrock,craigcook/bedrock,hoosteeno/bedrock,TheoChevalier/bedrock,kyoshino/bedrock,flodolo/bedrock,CSCI-462-01-2017/bedrock,TheoChevalier/bedrock,sgarrity/bedrock,Sancus/bedrock,alexgibson/bedrock,sylvestre/bedrock,Sancus/bedrock,TheoChevalier/bedrock,Sancus/bedrock,flodolo/bedrock,kyoshino/bedrock,sylvestre/bedrock,mozilla/bedrock,TheoChevalier/bedrock,pascalchevrel/bedrock,sgarrity/bedrock,schalkneethling/bedrock,flodolo/bedrock,mkmelin/bedrock,alexgibson/bedrock,mozilla/bedrock,craigcook/bedrock,gerv/bedrock,hoosteeno/bedrock,MichaelKohler/bedrock,sgarrity/bedrock,ericawright/bedrock,CSCI-462-01-2017/bedrock,mkmelin/bedrock,gerv/bedrock,pascalchevrel/bedrock,schalkneethling/bedrock,MichaelKohler/bedrock,schalkneethling/bedrock,mkmelin/bedrock,CSCI-462-01-2017/bedrock,gerv/bedrock,sgarrity/bedrock,MichaelKohler/bedrock,craigcook/bedrock,alexgibson/bedrock,pascalchevrel/bedrock,mkmelin/bedrock,Sancus/bedrock,sylvestre/bedrock,glogiotatidis/bedrock,pascalchevrel/bedrock,hoosteeno/bedrock,gerv/bedrock,sylvestre/bedrock,MichaelKohler/bedrock,glogiotatidis/bedrock,glogiotatidis/bedrock,ericawright/bedrock,CSCI-462-01-2017/bedrock,flodolo/bedrock,ericawright/bedrock,kyoshino/bedrock,kyoshino/bedrock,hoosteeno/bedrock,alexgibson/bedrock,mozilla/bedrock,schalkneethling/bedrock,ericawright/bedrock