Change js_emitter parts into libraries

pkg/compiler/lib/src/js_emitter/interceptor_stub_generator.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.
 
-part of dart2js.js_emitter;
+
+library dart2js.js_emitter.interceptor_stub_generator;
+
+import '../compiler.dart' show Compiler;
+import '../constants/values.dart';
+import '../elements/resolution_types.dart'
+    show
+    ResolutionInterfaceType;
+import '../elements/elements.dart'
+    show
+    ClassElement,
+    Element;
+import '../js/js.dart' as jsAst;
+import '../js/js.dart' show js;
+import '../js_backend/backend_helpers.dart' show BackendHelpers;
+import '../js_backend/js_backend.dart'
+    show
+    CustomElementsAnalysis,
+    JavaScriptBackend,
+    JavaScriptConstantCompiler,
+    Namer;
+import '../universe/selector.dart' show Selector;
+import '../world.dart' show ClosedWorld;
+
+import 'code_emitter_task.dart' show Emitter;
 
 class InterceptorStubGenerator {
   final Compiler compiler;
   final Namer namer;
   final JavaScriptBackend backend;
   final ClosedWorld closedWorld;
 
   InterceptorStubGenerator(
       this.compiler, this.namer, this.backend, this.closedWorld);
 
@@ skipping 379 matching lines @@
 
           var map = new jsAst.ObjectInitializer(properties);
           elements.add(map);
         }
       }
     }
 
     return new jsAst.ArrayInitializer(elements);
   }
 }