dart2js: Set the name to `null` for parameter stubs of static functions.

pkg/compiler/lib/src/js_emitter/parameter_stub_generator.dart

Index: pkg/compiler/lib/src/js_emitter/parameter_stub_generator.dart
diff --git a/pkg/compiler/lib/src/js_emitter/parameter_stub_generator.dart b/pkg/compiler/lib/src/js_emitter/parameter_stub_generator.dart
index 92cf30ed34b568ba17c03b6a5977c745c4201422..44350b58ffbd9de5607239afe8acc5013c31f53f 100644
--- a/pkg/compiler/lib/src/js_emitter/parameter_stub_generator.dart
+++ b/pkg/compiler/lib/src/js_emitter/parameter_stub_generator.dart
@@ -148,7 +148,7 @@ class ParameterStubGenerator {
 
     jsAst.Fun function = js('function(#) { #; }', [parametersBuffer, body]);
 
-    jsAst.Name name = namer.invocationName(selector);
+    jsAst.Name name = member.isStatic ? null : namer.invocationName(selector);
     jsAst.Name callName =
         (callSelector != null) ? namer.invocationName(callSelector) : null;
     return new ParameterStubMethod(name, callName, function);