Update the compiler to emit constructors with NoType.

This is follow up to the parent commit to bring the behavior
of the compiler up to date with the tools.

Author: sjrd

compiler/src/main/scala/org/scalajs/core/compiler/GenJSCode.scala

@@ -786,8 +786,8 @@ abstract class GenJSCode extends plugins.PluginComponent
                     optimizerHints, None)
               } else if (sym.isClassConstructor) {
                 js.MethodDef(static = false, methodName,
-                    jsParams, currentClassType,
-                    js.Block(genStat(rhs), genThis()))(optimizerHints, None)
+                    jsParams, jstpe.NoType,
+                    genStat(rhs))(optimizerHints, None)
               } else {
                 val resultIRType = toIRType(sym.tpe.resultType)
                 genMethodDef(static = sym.owner.isImplClass, methodName,
@@ -1704,7 +1704,7 @@ abstract class GenJSCode extends plugins.PluginComponent
           isModuleInitialized = true
           val thisType = jstpe.ClassType(encodeClassFullName(currentClassSym))
           val initModule = js.StoreModule(thisType, js.This()(thisType))
-          js.Block(superCall, initModule, js.This()(thisType))
+          js.Block(superCall, initModule)
         } else {
           superCall
         }
@@ -1888,8 +1888,11 @@ abstract class GenJSCode extends plugins.PluginComponent
         arguments: List[js.Tree])(implicit pos: Position): js.Tree = {
       val className = encodeClassFullName(method.owner)
       val methodIdent = encodeMethodSym(method)
+      val resultType =
+        if (method.isClassConstructor) jstpe.NoType
+        else toIRType(method.tpe.resultType)
       js.ApplyStatically(receiver, jstpe.ClassType(className),
-          methodIdent, arguments)(toIRType(method.tpe.resultType))
+          methodIdent, arguments)(resultType)
     }
 
     def genTraitImplApply(method: Symbol, arguments: List[js.Tree])(

ir/src/main/scala/org/scalajs/core/ir/Serializers.scala

@@ -588,8 +588,8 @@ object Serializers {
 
   private final class Deserializer(stream: InputStream, sourceVersion: String) {
     private[this] val useHacks060 = sourceVersion == "0.6.0"
-    private[this] val useHacks065 = true
-      //Set("0.6.0", "0.6.3", "0.6.4", "0.6.5").contains(sourceVersion)
+    private[this] val useHacks065 =
+      Set("0.6.0", "0.6.3", "0.6.4", "0.6.5").contains(sourceVersion)
 
     private[this] val input = new DataInputStream(stream)
 

project/JavaLangObject.scala

@@ -36,8 +36,8 @@ object JavaLangObject {
           static = false,
           Ident("init___", Some("<init>")),
           Nil,
-          AnyType,
-          This()(ThisType))(OptimizerHints.empty, None),
+          NoType,
+          Skip())(OptimizerHints.empty, None),
 
         /* def hashCode(): Int = System.identityHashCode(this) */
         MethodDef(