Rename Type to DartType to avoid conflicts with the class Type in the core library.

lib/compiler/implementation/js_backend/native_emitter.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.
 
 class NativeEmitter {
 
   CodeEmitterTask emitter;
   CodeBuffer nativeBuffer;
 
   // Classes that participate in dynamic dispatch. These are the
@@ skipping 166 matching lines @@
                                           List<String> argumentsBuffer) {
     FunctionSignature parameters = member.computeSignature(compiler);
     Element converter =
         compiler.findHelper(const SourceString('convertDartClosureToJS'));
     String closureConverter = compiler.namer.isolateAccess(converter);
     parameters.forEachParameter((Element parameter) {
       String name = parameter.name.slowToString();
       // If [name] is not in [argumentsBuffer], then the parameter is
       // an optional parameter that was not provided for that stub.
       if (argumentsBuffer.indexOf(name) == -1) return;
-      Type type = parameter.computeType(compiler).unalias(compiler);
+      DartType type = parameter.computeType(compiler).unalias(compiler);
       if (type is FunctionType) {
         // The parameter type is a function type either directly or through
         // typedef(s).
         int arity = type.computeArity();
         code.add('  $name = $closureConverter($name, $arity);\n');
       }
     });
   }
 
   String generateParameterStub(Element member,
@@ skipping 234 matching lines @@
         if (!first) targetBuffer.add(",\n");
         targetBuffer.add(" $name: $function");
         first = false;
       });
       targetBuffer.add("\n});\n\n");
     }
     targetBuffer.add('$nativeBuffer');
     targetBuffer.add('\n');
   }
 }