Clean up leg.dart.

dart/lib/compiler/implementation/apiimpl.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('leg_apiimpl');
+library leg_apiimpl;
 
-#import('dart:uri');
+import 'dart:uri';
 
-#import('../compiler.dart', prefix: 'api');
-#import('leg.dart', prefix: 'leg');
-#import('tree/tree.dart', prefix: 'tree');
-#import('elements/elements.dart', prefix: 'elements');
-#import('ssa/tracer.dart', prefix: 'ssa');
-#import('../../../lib/_internal/libraries.dart');
-#import('source_file.dart');
+import '../compiler.dart' as api;
+import 'dart2jslib.dart' as leg;
+import 'tree/tree.dart' as tree;
+import 'elements/elements.dart' as elements;
+import 'ssa/tracer.dart' as ssa;
+import '../../../lib/_internal/libraries.dart';
+import 'source_file.dart';
 
 class Compiler extends leg.Compiler {
   api.ReadStringFromUri provider;
   api.DiagnosticHandler handler;
   final Uri libraryRoot;
   final Uri packageRoot;
   List<String> options;
   bool mockableLibraryUsed = false;
 
   Compiler(this.provider, this.handler, this.libraryRoot, this.packageRoot,
@@ skipping 135 matching lines @@
       handler(translateUri(span.uri, null), span.begin, span.end,
               message, kind);
     }
   }
 
   bool get isMockCompilation {
     return mockableLibraryUsed
       && (options.indexOf('--allow-mock-compilation') != -1);
   }
 }