dart2js: support isolates in the startup-emitter.

sdk/lib/_internal/js_runtime/lib/isolate_helper.dart

Index: sdk/lib/_internal/js_runtime/lib/isolate_helper.dart
diff --git a/sdk/lib/_internal/js_runtime/lib/isolate_helper.dart b/sdk/lib/_internal/js_runtime/lib/isolate_helper.dart
index 5ff44bbc5f881fbeb560191959cdd340fa67b2dc..609f084377baa518cfee5ad1597e64c47c007e8e 100644
--- a/sdk/lib/_internal/js_runtime/lib/isolate_helper.dart
+++ b/sdk/lib/_internal/js_runtime/lib/isolate_helper.dart
@@ -9,9 +9,9 @@ import 'dart:_js_embedded_names' show
     CLASS_FIELDS_EXTRACTOR,
     CREATE_NEW_ISOLATE,
     CURRENT_SCRIPT,
-    GLOBAL_FUNCTIONS,
     INITIALIZE_EMPTY_INSTANCE,
-    INSTANCE_FROM_CLASS_ID;
+    INSTANCE_FROM_CLASS_ID,
+    STATIC_FUNCTION_NAME_PROPERTY_NAME;
 
 import 'dart:async';
 import 'dart:collection' show Queue;
@@ -24,6 +24,7 @@ import 'dart:_js_helper' show
     Null,
     Primitives,
     convertDartClosureToJS,
+    createDartClosureFromNameOfStaticFunction,
     isDartObject,
     random64,
     requiresPreamble;
@@ -904,8 +905,7 @@ class IsolateNatives {
   }
 
   static _getJSFunctionFromName(String functionName) {
-    var globalFunctionsContainer = JS_EMBEDDED_GLOBAL("", GLOBAL_FUNCTIONS);
-    return JS("", "#[#]()", globalFunctionsContainer, functionName);
+    return createDartClosureFromNameOfStaticFunction(functionName);
   }
 
   /**
@@ -914,7 +914,9 @@ class IsolateNatives {
    * but you should probably not count on this.
    */
   static String _getJSFunctionName(Function f) {
-    return (f is Closure) ? JS("String|Null", r'#.$name', f) : null;
+    return (f is Closure)
+        ? JS("String|Null", r'#[#]', f, STATIC_FUNCTION_NAME_PROPERTY_NAME)
+        : null;
   }
 
   /** Create a new JavaScript object instance given its constructor. */