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

pkg/compiler/lib/src/js_emitter/lazy_emitter/model_emitter.dart

 // Copyright (c) 2014, 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 dart2js.new_js_emitter.model_emitter;
 
 import '../../constants/values.dart' show ConstantValue, FunctionConstantValue;
 import '../../dart2jslib.dart' show Compiler;
 import '../../elements/elements.dart' show ClassElement, FunctionElement;
 import '../../js/js.dart' as js;
@@ skipping 65 matching lines @@
     if (constant.isFunction) return true;    // Already emitted.
     if (constant.isPrimitive) return true;   // Inlined.
     if (constant.isDummy) return true;       // Inlined.
     // The name is null when the constant is already a JS constant.
     // TODO(floitsch): every constant should be registered, so that we can
     // share the ones that take up too much space (like some strings).
     if (namer.constantName(constant) == null) return true;
     return false;
   }
 
-  // TODO(floitsch): copied from OldEmitter. Adjust or share.
+  // TODO(floitsch): copied from full emitter. Adjust or share.
   int compareConstants(ConstantValue a, ConstantValue b) {
     // Inlined constants don't affect the order and sometimes don't even have
     // names.
     int cmp1 = isConstantInlinedOrAlreadyEmitted(a) ? 0 : 1;
     int cmp2 = isConstantInlinedOrAlreadyEmitted(b) ? 0 : 1;
     if (cmp1 + cmp2 < 2) return cmp1 - cmp2;
 
     // Emit constant interceptors first. Constant interceptors for primitives
     // might be used by code that builds other constants.  See Issue 18173.
     if (a.isInterceptor != b.isInterceptor) {
@@ skipping 1141 matching lines @@
 
   var end = Date.now();
   // print('Setup: ' + (end - start) + ' ms.');
 
   #invokeMain;  // Start main.
 
 })(Date.now(), #code)
 }""";
 
 }