Fix in testing scripts, decodeUtf8->encodeUtf8

tools/testing/dart/test_runner.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.
 
 /**
  * Classes and methods for executing tests.
  *
  * This module includes:
  * - Managing parallel execution of tests, including timeout checks.
  * - Evaluating the output of each test as pass/fail/crash/timeout.
@@ skipping 1302 matching lines @@
       // Otherwise, process output and call _reportResult() when done.
       var line = stream.readLine();
       while (line != null) {
         if (line.startsWith('>>> TEST')) {
           _status = line;
         } else if (line.startsWith('>>> BATCH START')) {
           // ignore
         } else if (line.startsWith('>>> ')) {
           throw new Exception('Unexpected command from dartc batch runner.');
         } else {
-          buffer.addAll(decodeUtf8(line));
+          buffer.addAll(encodeUtf8(line));
           buffer.addAll("\n".charCodes);
         }
         line = stream.readLine();
       }
       if (_status != null) {
         _timer.cancel();
         _stdoutDone();
       }
     }
     stream.onLine = onLineHandler;
   }
 
   void _readStderr(io.StringInputStream stream, List<int> buffer) {
     var ignoreStreams = _ignoreStreams;  // Capture this mutable object.
     void onLineHandler() {
       if (ignoreStreams.value) {
         while (stream.readLine() != null) {
           // Do nothing.
         }
         return;
       }
       // Otherwise, process output and call _reportResult() when done.
       var line = stream.readLine();
       while (line != null) {
         if (line.startsWith('>>> EOF STDERR')) {
           _stderrDone();
         } else {
-          buffer.addAll(decodeUtf8(line));
+          buffer.addAll(encodeUtf8(line));
           buffer.addAll("\n".charCodes);
         }
         line = stream.readLine();
       }
     }
     stream.onLine = onLineHandler;
   }
 
   ExitCodeEvent makeExitHandler(String status) {
     void handler(int exitCode) {
@@ skipping 389 matching lines @@
         // the developer doesn't waste his or her time trying to fix a bunch of
         // tests that appear to be broken but were actually just flakes that
         // didn't get retried because there had already been one failure.
         bool allowRetry = _MAX_FAILED_NO_RETRY > _progress.numFailedTests;
         new RunningProcess(test, allowRetry, this).start();
       }
       _numProcesses++;
     }
   }
 }