Generate tear-off closures dynamically.

dart/sdk/lib/_internal/compiler/implementation/js_backend/namer.dart

Index: dart/sdk/lib/_internal/compiler/implementation/js_backend/namer.dart
diff --git a/dart/sdk/lib/_internal/compiler/implementation/js_backend/namer.dart b/dart/sdk/lib/_internal/compiler/implementation/js_backend/namer.dart
index 04eebd383738da40c067c4ec94776109e7208fce..2a70e3e34bc82713821055a5e51616469e37680f 100644
--- a/dart/sdk/lib/_internal/compiler/implementation/js_backend/namer.dart
+++ b/dart/sdk/lib/_internal/compiler/implementation/js_backend/namer.dart
@@ -368,6 +368,8 @@ class Namer implements ClosureNamer {
   }
 
   String instanceMethodName(FunctionElement element) {
+    // TODO(ahe): Could this be: return invocationName(new
+    // Selector.fromElement(element))?
     String elementName = element.name;
     String name = operatorNameToIdentifier(elementName);
     if (name != elementName) return getMappedOperatorName(name);
@@ -890,7 +892,7 @@ class Namer implements ClosureNamer {
   }
 
   String isolateStaticClosureAccess(Element element) {
-    return "${globalObjectFor(element)}.${getStaticClosureName(element)}";
+    return "${globalObjectFor(element)}.${getStaticClosureName(element)}()";
   }
 
   String globalObjectForConstant(Constant constant) => 'C';