dart2js: make "CREATE_JS_ISOLATE" an embedded global.

sdk/lib/_internal/compiler/js_lib/isolate_helper.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 _isolate_helper;
 
 import 'dart:_js_embedded_names' show
     CLASS_ID_EXTRACTOR,
     CLASS_FIELDS_EXTRACTOR,
+    CREATE_NEW_ISOLATE,
     CURRENT_SCRIPT,
     GLOBAL_FUNCTIONS,
     INITIALIZE_EMPTY_INSTANCE,
     INSTANCE_FROM_CLASS_ID;
 
 import 'dart:async';
 import 'dart:collection' show Queue, HashMap;
 import 'dart:isolate';
 import 'dart:_native_typed_data' show NativeByteBuffer, NativeTypedData;
 
 import 'dart:_js_helper' show
     Closure,
     InternalMap,
     Null,
     Primitives,
     convertDartClosureToJS,
     random64,
     requiresPreamble;
 
 import 'dart:_foreign_helper' show DART_CLOSURE_TO_JS,
                                    JS,
-                                   JS_CREATE_ISOLATE,
                                    JS_CURRENT_ISOLATE_CONTEXT,
                                    JS_CURRENT_ISOLATE,
                                    JS_EMBEDDED_GLOBAL,
                                    JS_SET_CURRENT_ISOLATE,
                                    IsolateContext;
 
 import 'dart:_interceptors' show Interceptor,
                                  JSArray,
                                  JSExtendableArray,
                                  JSFixedArray,
@@ skipping 240 matching lines @@
   final int id = _globalState.nextIsolateId++;
 
   /** Registry of receive ports currently active on this isolate. */
   final Map<int, RawReceivePortImpl> ports = new Map<int, RawReceivePortImpl>();
 
   /** Registry of weak receive ports currently active on this isolate. */
   final Set<int> weakPorts = new Set<int>();
 
   /** Holds isolate globals (statics and top-level properties). */
   // native object containing all globals of an isolate.
-  final isolateStatics = JS_CREATE_ISOLATE();
+  final isolateStatics =
+      JS('', "#()", JS_EMBEDDED_GLOBAL('', CREATE_NEW_ISOLATE));
 
   final RawReceivePortImpl controlPort = new RawReceivePortImpl._controlPort();
 
   final Capability pauseCapability = new Capability();
   final Capability terminateCapability = new Capability();  // License to kill.
 
   /// Boolean flag set when the initial method of the isolate has been executed.
   ///
   /// Used to avoid considering the isolate dead when it has no open
   /// receive ports and no scheduled timers, because it hasn't had time to
@@ skipping 1142 matching lines @@
   }
 
   bool operator==(Object other) {
     if (identical(other, this)) return true;
     if (other is CapabilityImpl) {
       return identical(_id, other._id);
     }
     return false;
   }
 }