dart2js: Rename old emitter to full emitter and make it its own library.

tests/compiler/dart2js/mirrors_used_test.dart

 // Copyright (c) 2013, 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.
 
 /// Test that the @MirrorsUsed annotation suppress hints and that only
 /// requested elements are retained for reflection.
 library dart2js.test.mirrors_used_test;
 
 import 'package:expect/expect.dart';
 import "package:async_helper/async_helper.dart";
 
 import 'memory_compiler.dart' show
     compilerFor;
 
 import 'package:compiler/src/apiimpl.dart' show
     Compiler;
 
 import 'package:compiler/src/constants/values.dart' show
     ConstantValue,
     TypeConstantValue;
 
 import 'package:compiler/src/elements/elements.dart' show
     Element,
     Elements;
 
 import 'package:compiler/src/js_backend/js_backend.dart' show
     JavaScriptBackend;
 
+import 'package:compiler/src/js_emitter/full_emitter/emitter.dart'
+    as full show Emitter;
+
 void expectOnlyVerboseInfo(Uri uri, int begin, int end, String message, kind) {
   if (kind.name == 'verbose info') {
     print(message);
     return;
   }
   if (message.contains('methods retained for use by dart:mirrors out of')) {
     print(message);
     return;
   }
   if (kind.name == 'info') return;
@@ skipping 45 matching lines @@
           compiler.stringClass, compiler.boolClass, compiler.nullClass,
           compiler.listClass
         ];
     JavaScriptBackend backend = compiler.backend;
     Iterable<String> nativeNames = nativeClasses.map(backend.namer.className);
     expectedNames = expectedNames.map(backend.namer.asName).toList();
     expectedNames.addAll(nativeNames);
 
     // Mirrors only work in the full emitter. We can thus be certain that the
     // emitter is the full emitter.
-    OldEmitter fullEmitter = backend.emitter.emitter;
+    full.Emitter fullEmitter = backend.emitter.emitter;
     Set recordedNames = new Set()
         ..addAll(fullEmitter.recordedMangledNames)
         ..addAll(fullEmitter.mangledFieldNames.keys)
         ..addAll(fullEmitter.mangledGlobalFieldNames.keys);
     Expect.setEquals(new Set.from(expectedNames), recordedNames);
 
     for (var library in compiler.libraryLoader.libraries) {
       library.forEachLocalMember((member) {
         if (library == compiler.mainApp && member.name == 'Foo') {
           Expect.isTrue(
@@ skipping 64 matching lines @@
 library lib;
 
 import 'dart:mirrors';
 
 useReflect(type) {
   print(new Symbol('Foo'));
   print(MirrorSystem.getName(reflectClass(type).owner.qualifiedName));
 }
 """,
 };