Don't wait unnecessarily.

compiler/java/com/google/dart/compiler/backend/isolate/DartIsolateStubGenerator.java

Index: compiler/java/com/google/dart/compiler/backend/isolate/DartIsolateStubGenerator.java
===================================================================
--- compiler/java/com/google/dart/compiler/backend/isolate/DartIsolateStubGenerator.java	(revision 734)
+++ compiler/java/com/google/dart/compiler/backend/isolate/DartIsolateStubGenerator.java	(working copy)
@@ -271,7 +271,7 @@
    */
   private void generateProxyClass(DartClass clazz) {
     String name = clazz.getClassName();
-    p("interface " + name + "$Proxy {");
+    p("interface " + name + "$Proxy extends Proxy {");
     printProxyInterfaceFunctions(clazz);
     p("}");
     nl();
@@ -411,22 +411,12 @@
       p("\") {");
       nl();
       int proxies = unpackParams(member);
-      String extra = "";
       if (proxies != 0) {
-        p("      Promise done = new Promise();");
-        nl();
-        p("      done.waitFor(promises, " + proxies + ");");
-        nl();
-        p("      done.addCompleteHandler((_) {");
-        nl();
+        // FIXME(benl): we don't need to gather them anymore, could just pass them directly. Too
+        // lazy right now.
         gatherProxies(member);
-        extra = "  ";
       }
-      callTarget((DartMethodDefinition)member, extra);
-      if (proxies != 0) {
-        p("      });");
-        nl();
-      }
+      callTarget((DartMethodDefinition)member, "");
       p("    }");
       first = false;
     }
@@ -648,7 +638,7 @@
         boolean isSimpleType = isSimpleType(x.getTypeNode());
 
         if (!isSimpleType) {
-          p("        ");
+          p("      ");
           accept(x.getTypeNode());
           p(" ");
           accept(x.getName());