Move dart2js from sdk/lib/_internal/compiler to pkg/compiler

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;
 
 class InterceptorStubGenerator {
   final Compiler compiler;
   final Namer namer;
   final JavaScriptBackend backend;
@@ skipping 298 matching lines @@
         _fastPathForOneShotInterceptor(selector, classes);
     if (optimizedPath == null) optimizedPath = js.statement(';');
 
     return js(
         'function(#) { #; return #.#(receiver).#(#) }',
         [parameterNames,
          optimizedPath,
          globalObject, getInterceptorName, invocationName, parameterNames]);
   }
 }