Move names from ClassTags to StdNames.

Author: DarkDimius

src/dotty/tools/dotc/core/StdNames.scala

@@ -149,8 +149,10 @@ object StdNames {
     final val Seq: N        = "Seq"
     final val Symbol: N     = "Symbol"
     final val ClassTag: N   = "ClassTag"
+    final val classTag: N   = "classTag"
     final val WeakTypeTag: N = "WeakTypeTag"
     final val TypeTag : N   = "TypeTag"
+    final val typeTag: N    = "typeTag"
     final val Expr: N       = "Expr"
     final val String: N     = "String"
     final val Annotation: N = "Annotation"

src/dotty/tools/dotc/transform/ClassTags.scala

@@ -25,11 +25,6 @@ import collection.mutable
 class ClassTags extends MiniPhaseTransform with IdentityDenotTransformer { thisTransform =>
   import ast.tpd._
 
-  object names {
-    val classTag = "classTag".toTermName
-    val typeTag  = "typeTag".toTermName
-  }
-
   private var classTagCache: Symbol = null
   private var typeTagCache: Symbol  = null
   private var scala2ClassTagModule: Symbol = null