Fix Flutter engine build

runtime/vm/dart.cc

Index: runtime/vm/dart.cc
diff --git a/runtime/vm/dart.cc b/runtime/vm/dart.cc
index 3949b8b51bdd18fe013d054b835201a33f3ee0d1..c836a5064da75cdcf118957057ee53570c6d7b27 100644
--- a/runtime/vm/dart.cc
+++ b/runtime/vm/dart.cc
@@ -605,23 +605,23 @@ RawError* Dart::InitializeIsolate(const uint8_t* snapshot_data,
   }
 
   bool is_kernel_isolate = false;
+  USE(is_kernel_isolate);
+
 #ifndef DART_PRECOMPILED_RUNTIME
   KernelIsolate::InitCallback(I);
   is_kernel_isolate = KernelIsolate::IsKernelIsolate(I);
 #endif
-  ServiceIsolate::MaybeMakeServiceIsolate(I);
+
 #if !defined(PRODUCT)
+  ServiceIsolate::MaybeMakeServiceIsolate(I);

[rmacnak, 2017/07/19 16:56:36]

I would leave this line in. The standalone embedder still starts the service
isolate in product mode to use as the loader.

   if (!ServiceIsolate::IsServiceIsolate(I) && !is_kernel_isolate) {
     I->message_handler()->set_should_pause_on_start(
         FLAG_pause_isolates_on_start);
     I->message_handler()->set_should_pause_on_exit(FLAG_pause_isolates_on_exit);
   }
-#endif  // !defined(PRODUCT)
-
   ServiceIsolate::SendIsolateStartupMessage();
-#if !defined(PRODUCT)
   I->debugger()->NotifyIsolateCreated();
-#endif
+#endif  // !defined(PRODUCT)
 
   // Create tag table.
   I->set_tag_table(GrowableObjectArray::Handle(GrowableObjectArray::New()));