Update dart2js deps to prevent crash on unsupported platform libraries.

lib/src/run_batch.dart

 // Copyright (c) 2016, 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.md file.
 
 library rasta.run_batch;
 
 import 'dart:async' show
     Future,
     Stream;
 
@@ skipping 49 matching lines @@
 
     Uri testDirectory = compiler.translateUri(null, options.input);
 
     // TODO(ahe): This lists all tests in [testDirectory] and generates Kernel
     // IR for them all. However, batch mode should be a server that is
     // controlled by test.dart.
     // TODO(ahe): Share more code with RunSingle.
 
     List<TestDescription> failures = <TestDescription>[];
 
-    int count = 1;
+    int count = 0;
     print("\n");
     Stream<TestDescription> tests =
         listTests(<Uri>[testDirectory], pattern: options.pattern);
     await for (TestDescription description in tests) {
+      count++;
       try {
         Options options = new Options(
             description.uri,
             description.uri.resolve("${description.uri.path}.bart"),
             generateLibrary: this.options.generateLibrary);
 
         ir.Library library = await kernel.loadLibrary(options.input);
         kernel.processWorkQueue(targetLibrary: options.input);
 
         if (options.generateLibrary == true) {
@@ skipping 25 matching lines @@
       String successes = padTo(count - failures.length, 5);
       String failuresPadded = padTo(failures.length, 5);
       print(
           "\u001b[1A"
           "\u001b[2K"
           "\u001b[1A"
           "\u001b[2K"
           "Average time per test: ${averageTimeMs}ms\n"
           "[${wallClock.elapsed} | --% | +$successes | -$failuresPadded ]"
         );
-      count++;
     }
     wallClock.stop();
     String averageTimeMs =
         (wallClock.elapsedMilliseconds / count).toStringAsFixed(3);
 
     if (failures.isNotEmpty) {
       print("\n=== Failures ===\n");
       for (TestDescription description in failures) {
         print("${relativize(Uri.base, description.uri, false)}: Fail");
       }
     }
 
     print(
 """
 
 === Summary ===
 Total: $count
 Failures: ${failures.length}
 Average time per test: ${averageTimeMs}ms
 Success rate: ${(100 - failures.length * 100/count).toStringAsFixed(2)}%""");
   }
 }
 
 String padTo(int i, int pad) {
   String result = (" " * pad) + "$i";
   return result.substring(result.length - pad);
 }