Continue improving the documentation for the vm service protocol.

runtime/lib/isolate.cc

Index: runtime/lib/isolate.cc
diff --git a/runtime/lib/isolate.cc b/runtime/lib/isolate.cc
index c4eea3b36a0f29501e32302c253bd433260e8e91..1f72dc2699851bb269f7e4d1f7dca9d05fca2c0f 100644
--- a/runtime/lib/isolate.cc
+++ b/runtime/lib/isolate.cc
@@ -227,6 +227,8 @@ DEFINE_NATIVE_ENTRY(Isolate_spawnFunction, 4) {
       ctx = Closure::context(closure);
       ASSERT(ctx.num_variables() == 0);
 #endif
+      // Get the parent function so that we get the right function name.
+      func = func.parent_function();
       Spawn(isolate, new IsolateSpawnState(port.Id(),
                                            func,
                                            message,