- Ensure that classes are finalized before their description is

runtime/bin/vmservice/client/build.dart

Index: runtime/bin/vmservice/client/build.dart
===================================================================
--- runtime/bin/vmservice/client/build.dart	(revision 30491)
+++ runtime/bin/vmservice/client/build.dart	(working copy)
@@ -13,10 +13,18 @@
 
 compileToJs(_) {
   print("Running dart2js");
+	var dart_path = Platform.executable;
+	var bin_path = dart_path.substring(0, dart_path.lastIndexOf(Platform.pathSeparator));
+	var dart2js_path = "$bin_path${Platform.pathSeparator}dart2js";
   var result =
-    Process.runSync('dart2js',
+    Process.runSync(dart2js_path,
         [ '--minify', '-o', 'out/web/index.html_bootstrap.dart.js',
         'out/web/index.html_bootstrap.dart'], runInShell: true);
   print(result.stdout);
+  print(result.stderr);
+  if (result.exitCode != 0) {
+    print("Running dart2js failed.");
+    exit(result.exitCode);
+  }
   print("Done");
 }