Handle type variable test and typed list literal.

pkg/compiler/lib/src/ssa/builder.dart

Index: pkg/compiler/lib/src/ssa/builder.dart
diff --git a/pkg/compiler/lib/src/ssa/builder.dart b/pkg/compiler/lib/src/ssa/builder.dart
index bced3688757b1b19b1c2cf527644cfe670609b2b..a75c0d2861d492c992d5a22e376ff48ed4e2e47d 100644
--- a/pkg/compiler/lib/src/ssa/builder.dart
+++ b/pkg/compiler/lib/src/ssa/builder.dart
@@ -256,7 +256,7 @@ class SsaAstGraphBuilder extends ast.Visitor
         closedWorld.nativeData,
         closedWorld.interceptorData);
     loopHandler = new SsaLoopHandler(this);
-    typeBuilder = new TypeBuilderImpl(this);
+    typeBuilder = new TypeBuilder(this);
   }
 
   MemberElement get targetElement => target;
@@ -6853,12 +6853,3 @@ class AstInliningState extends InliningState {
       this.oldElementInferenceResults)
       : super(function);
 }
-
-class TypeBuilderImpl extends TypeBuilder {
-  TypeBuilderImpl(GraphBuilder builder) : super(builder);
-
-  @override
-  InterfaceType getThisType(covariant ClassElement cls) {
-    return cls.thisType;
-  }
-}