Support compiling templates in the browser.

example/explainer/build_examples.dart

 #!/usr/bin/env dart
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * Script to compile each dart web component examples and copy the
  * generated code to an output directory.
  */
 library build_examples;
@@ skipping 39 matching lines @@
   var processes = inputs.map((input) => buildSingle(input, output));
   Futures.wait(processes)
       .then((_) {
         print('----- time summary -----');
         totalTime.forEach((s) => print(s));
       });
 }
 
 Future buildSingle(String input, String output) {
   var timer = startTime();
-  dwc.run([input, output]);
-  stopTime(timer, 'dwc - compile $input');
+  return dwc.run([input, output]).chain((_) {
+    stopTime(timer, 'dwc - compile $input');
 
-  timer = startTime();
-  var dartFile ='$output/${input}_bootstrap.dart';
-  var res = Process.run('dart2js', ['-ppackages/', dartFile, '-o$dartFile.js']);
-  return res.transform((r) {
-    if (r.exitCode != 0) {
-      print(r.stdout);
-      print(r.stderr);
-    }
-    stopTime(timer, 'dart2js - compile ${input}_boostrap.dart');
+    timer = startTime();
+    var dartFile ='$output/_${input}_bootstrap.dart';
+    var res = Process.run('dart2js', ['-ppackages/', dartFile, '-o$dartFile.js']);
+    return res.transform((r) {
+      if (r.exitCode != 0) {
+        print(r.stdout);
+        print(r.stderr);
+      }
+      stopTime(timer, 'dart2js - compile ${input}_boostrap.dart');
+    });
   });
 }
 
 
 final String GREEN_COLOR = '\u001b[32m';
 final String NO_COLOR = '\u001b[0m';
 
 Stopwatch startTime() => new Stopwatch()..start();
 
 void stopTime(Stopwatch watch, String message) {
   watch.stop();
   var duration = watch.elapsedInMs();
   print('$message: $GREEN_COLOR$duration ms$NO_COLOR');
   totalTime.add('$message: $GREEN_COLOR$duration ms$NO_COLOR');
 }