Remove some warnings and errors from dart2js.

sdk/lib/_internal/compiler/implementation/native_handler.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.
 
 library native;
 
 import 'dart:uri';
 import 'dart2jslib.dart' hide SourceString;
 import 'elements/elements.dart';
 import 'js_backend/js_backend.dart';
@@ skipping 776 matching lines @@
   }
   return false;
 }
 
 final RegExp nativeRedirectionRegExp = new RegExp(r'^[a-zA-Z][a-zA-Z_$0-9]*$');
 
 void handleSsaNative(SsaBuilder builder, Expression nativeBody) {
   Compiler compiler = builder.compiler;
   FunctionElement element = builder.work.element;
   NativeEmitter nativeEmitter = builder.emitter.nativeEmitter;
-  // If what we're compiling is a getter named 'typeName' and the native
-  // class is named 'DOMType', we generate a call to the typeNameOf
-  // function attached on the isolate.
-  // The DOM classes assume that their 'typeName' property, which is
-  // not a JS property on the DOM types, returns the type name.
-  if (element.name == const SourceString('typeName')
-      && element.isGetter()
-      && nativeEmitter.toNativeName(element.getEnclosingClass()) == 'DOMType') {
-    Element helper =
-        compiler.findHelper(const SourceString('getTypeNameOf'));
-    builder.pushInvokeHelper1(helper, builder.localsHandler.readThis());
-    builder.close(new HReturn(builder.pop())).addSuccessor(builder.graph.exit);
-  }
 
   HInstruction convertDartClosure(Element parameter, FunctionType type) {
     HInstruction local = builder.localsHandler.readLocal(parameter);
     Constant arityConstant =
         builder.constantSystem.createInt(type.computeArity());
     HInstruction arity = builder.graph.addConstant(arityConstant);
     // TODO(ngeoffray): For static methods, we could pass a method with a
     // defined arity.
     Element helper = builder.interceptors.getClosureConverter();
     builder.pushInvokeHelper2(helper, local, arity);
@@ skipping 81 matching lines @@
         builder.add(new HForeign(
             new DartString.literal('${parameter.name.slowToString()} = #'),
             const LiteralDartString('void'),
             <HInstruction>[jsClosure]));
       }
     });
     LiteralString jsCode = nativeBody.asLiteralString();
     builder.push(new HForeign.statement(jsCode.dartString, <HInstruction>[]));
   }
 }