Add a `@JSExportName` annotation for internal use in the runtime (use it to export dart.assert inst…

lib/runtime/dart/_foreign_helper.js

 dart_library.library('dart/_foreign_helper', null, /* Imports */[
   "dart/_runtime",
   'dart/core'
 ], /* Lazy imports */[
 ], function(exports, dart, core) {
   'use strict';
   let dartx = dart.dartx;
   function JS(typeDescription, codeTemplate, arg0, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11) {
     if (arg0 === void 0) arg0 = null;
     if (arg1 === void 0) arg1 = null;
     if (arg2 === void 0) arg2 = null;
     if (arg3 === void 0) arg3 = null;
     if (arg4 === void 0) arg4 = null;
     if (arg5 === void 0) arg5 = null;
     if (arg6 === void 0) arg6 = null;
     if (arg7 === void 0) arg7 = null;
     if (arg8 === void 0) arg8 = null;
     if (arg9 === void 0) arg9 = null;
     if (arg10 === void 0) arg10 = null;
     if (arg11 === void 0) arg11 = null;
   }
   dart.fn(JS, dart.dynamic, [core.String, core.String], [dart.dynamic, dart.dynamic, dart.dynamic, dart.dynamic, dart.dynamic, dart.dynamic, dart.dynamic, dart.dynamic, dart.dynamic, dart.dynamic, dart.dynamic, dart.dynamic]);
+  class JSExportName extends core.Object {
+    JSExportName(name) {
+      this.name = name;
+    }
+  }
+  dart.setSignature(JSExportName, {
+    constructors: () => ({JSExportName: [JSExportName, [core.String]]})
+  });
   function JS_CURRENT_ISOLATE_CONTEXT() {
   }
   dart.fn(JS_CURRENT_ISOLATE_CONTEXT, () => dart.definiteFunctionType(IsolateContext, []));
   class IsolateContext extends core.Object {}
   function JS_CALL_IN_ISOLATE(isolate, func) {
   }
   dart.fn(JS_CALL_IN_ISOLATE, dart.dynamic, [dart.dynamic, core.Function]);
   function JS_SET_CURRENT_ISOLATE(isolate) {
   }
   dart.fn(JS_SET_CURRENT_ISOLATE, dart.void, [dart.dynamic]);
@@ skipping 71 matching lines @@
   }
   dart.setSignature(JS_CONST, {
     constructors: () => ({JS_CONST: [JS_CONST, [core.String]]})
   });
   function JS_STRING_CONCAT(a, b) {
     return a + b;
   }
   dart.fn(JS_STRING_CONCAT, core.String, [core.String, core.String]);
   // Exports:
   exports.JS = JS;
+  exports.JSExportName = JSExportName;
   exports.JS_CURRENT_ISOLATE_CONTEXT = JS_CURRENT_ISOLATE_CONTEXT;
   exports.IsolateContext = IsolateContext;
   exports.JS_CALL_IN_ISOLATE = JS_CALL_IN_ISOLATE;
   exports.JS_SET_CURRENT_ISOLATE = JS_SET_CURRENT_ISOLATE;
   exports.JS_CREATE_ISOLATE = JS_CREATE_ISOLATE;
   exports.JS_DART_OBJECT_CONSTRUCTOR = JS_DART_OBJECT_CONSTRUCTOR;
   exports.JS_INTERCEPTOR_CONSTANT = JS_INTERCEPTOR_CONSTANT;
   exports.JS_OPERATOR_IS_PREFIX = JS_OPERATOR_IS_PREFIX;
   exports.JS_OPERATOR_AS_PREFIX = JS_OPERATOR_AS_PREFIX;
   exports.JS_OBJECT_CLASS_NAME = JS_OBJECT_CLASS_NAME;
   exports.JS_NULL_CLASS_NAME = JS_NULL_CLASS_NAME;
   exports.JS_FUNCTION_CLASS_NAME = JS_FUNCTION_CLASS_NAME;
   exports.JS_IS_INDEXABLE_FIELD_NAME = JS_IS_INDEXABLE_FIELD_NAME;
   exports.JS_CURRENT_ISOLATE = JS_CURRENT_ISOLATE;
   exports.JS_SIGNATURE_NAME = JS_SIGNATURE_NAME;
   exports.JS_TYPEDEF_TAG = JS_TYPEDEF_TAG;
   exports.JS_FUNCTION_TYPE_TAG = JS_FUNCTION_TYPE_TAG;
   exports.JS_FUNCTION_TYPE_VOID_RETURN_TAG = JS_FUNCTION_TYPE_VOID_RETURN_TAG;
   exports.JS_FUNCTION_TYPE_RETURN_TYPE_TAG = JS_FUNCTION_TYPE_RETURN_TYPE_TAG;
   exports.JS_FUNCTION_TYPE_REQUIRED_PARAMETERS_TAG = JS_FUNCTION_TYPE_REQUIRED_PARAMETERS_TAG;
   exports.JS_FUNCTION_TYPE_OPTIONAL_PARAMETERS_TAG = JS_FUNCTION_TYPE_OPTIONAL_PARAMETERS_TAG;
   exports.JS_FUNCTION_TYPE_NAMED_PARAMETERS_TAG = JS_FUNCTION_TYPE_NAMED_PARAMETERS_TAG;
   exports.JS_GET_NAME = JS_GET_NAME;
   exports.JS_EMBEDDED_GLOBAL = JS_EMBEDDED_GLOBAL;
   exports.JS_GET_FLAG = JS_GET_FLAG;
   exports.JS_EFFECT = JS_EFFECT;
   exports.JS_CONST = JS_CONST;
   exports.JS_STRING_CONCAT = JS_STRING_CONCAT;
 });