Fix runtimeType.toString for tear-offs.

pkg/compiler/lib/src/js_emitter/new_emitter/model_emitter.dart

Index: pkg/compiler/lib/src/js_emitter/new_emitter/model_emitter.dart
diff --git a/pkg/compiler/lib/src/js_emitter/new_emitter/model_emitter.dart b/pkg/compiler/lib/src/js_emitter/new_emitter/model_emitter.dart
index b302033e8a8fa19fdea4760f045f2ad20c2e41e3..24b02570dcda15cd2bb0b4283c41fba0e1f734cd 100644
--- a/pkg/compiler/lib/src/js_emitter/new_emitter/model_emitter.dart
+++ b/pkg/compiler/lib/src/js_emitter/new_emitter/model_emitter.dart
@@ -88,8 +88,6 @@ class ModelEmitter {
 
   static const String deferredExtension = "part.js";
 
-  static const String typeNameProperty = r"builtin$cls";
-
   ModelEmitter(Compiler compiler, Namer namer, this.nativeEmitter)
       : this.compiler = compiler,
         this.namer = namer {
@@ -1185,7 +1183,10 @@ function parseFunctionDescriptor(proto, name, descriptor, typesOffset) {
                               typesOffset);
     }
 
-    constructor.$typeNameProperty = name;  // Needed for RTI.
+    if (typeof constructor.name != 'string') {

[sra1, 2015/06/26 23:10:09]

Use double quotes in JS for consistency with generated code.

[floitsch, 2015/07/01 17:00:14]

done. also in other places.

+      // IE does not store the name, but allows to modify the property.
+      constructor.name = name;
+    }
     constructor.prototype = prototype;
     prototype[#operatorIsPrefix + name] = constructor;
     prototype.constructor = constructor;