Revert "Adjusts dart2js SSA builder to tolerate method type arguments."

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

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:collection';
 
 import 'package:js_runtime/shared/embedded_names.dart';
 
 import '../closure.dart';
 import '../common.dart';
@@ skipping 4748 matching lines @@
         // never built standalone, so in that case [target] is not
         // the [member] itself.
         (member.isField && member != target)) {
       // The type variable is stored in a parameter of the method.
       return localsHandler.readLocal(typeVariableLocal,
           sourceInformation: sourceInformation);
     } else if (member.isInstanceMember) {
       // The type variable is stored on the object.
       return readTypeVariable(member.enclosingClass, type.element,
           sourceInformation: sourceInformation);
-    } else if (type is MethodTypeVariableType) {
-      // TODO(eernst): The enclosing `else if` was added to provide minimal
-      // support for generic methods: The method type arguments are always
-      // pretending to have the value `dynamic`. Revise for full support.
-      DynamicType type = const DynamicType();
-      JavaScriptBackend backend = compiler.backend;
-      ClassElement cls = backend.helpers.DynamicRuntimeType;
-      HInstruction instruction =
-          new HDynamicType(type, new TypeMask.exact(cls, compiler.world));
-      add(instruction);
-      return instruction;
     } else {
       reporter.internalError(
           type.element, 'Unexpected type variable in static context.');
       return null;
     }
   }
 
   HInstruction analyzeTypeArgument(DartType argument,
       {SourceInformation sourceInformation}) {
     assert(assertTypeInContext(argument));
@@ skipping 3821 matching lines @@
   const _LoopTypeVisitor();
   int visitNode(ast.Node node) => HLoopBlockInformation.NOT_A_LOOP;
   int visitWhile(ast.While node) => HLoopBlockInformation.WHILE_LOOP;
   int visitFor(ast.For node) => HLoopBlockInformation.FOR_LOOP;
   int visitDoWhile(ast.DoWhile node) => HLoopBlockInformation.DO_WHILE_LOOP;
   int visitAsyncForIn(ast.AsyncForIn node) => HLoopBlockInformation.FOR_IN_LOOP;
   int visitSyncForIn(ast.SyncForIn node) => HLoopBlockInformation.FOR_IN_LOOP;
   int visitSwitchStatement(ast.SwitchStatement node) =>
       HLoopBlockInformation.SWITCH_CONTINUE_LOOP;
 }