Bug 1399249 - Add .xhtml, .xhtm and .xht to Application Reputation checks. r=gcp

MozReview-Commit-ID: BP8bGNIcttB

--HG--
extra : rebase_source : 77a387f1a62a0bab70ca305ad46b9df08fcbd078

toolkit/components/downloads/ApplicationReputation.cpp

@@ -670,6 +670,9 @@ static const char16_t* const kBinaryFileExtensions[] = {
     u".wsh", // Windows script
     u".xar", // MS Excel
     u".xbap", // XAML Browser Application
+    u".xhtml",
+    u".xhtm",
+    u".xht",
     u".xip", // Mac archive
     //u".xlsm", // MS Excel
     //u".xlsx", // MS Excel