Remove \r in command stdout/stderr when building failure a failure output.

tools/testing/dart/test_progress.dart

Index: tools/testing/dart/test_progress.dart
diff --git a/tools/testing/dart/test_progress.dart b/tools/testing/dart/test_progress.dart
index 773321746121a98932eee4574e604cfa08376491..46b83dc0744b8ba24bc461e95171067c0973beb3 100644
--- a/tools/testing/dart/test_progress.dart
+++ b/tools/testing/dart/test_progress.dart
@@ -98,13 +98,15 @@ List<String> _buildFailureOutput(TestCase test,
       output.add('DRT pixel test failed! stdout is not printed because it '
                  'contains binary data!');
     } else {
-      output.add(decodeUtf8(test.lastCommandOutput.stdout));
+      output.addAll(decodeUtf8(test.lastCommandOutput.stdout)
+          .replaceAll('\r\n', '\n').split('\n'));

[ahe, 2013/04/03 10:13:58]

How about creating a method for this?

I suggest you also do ".replaceAll('\r', '\n')" after replacing all \r\n.  This
should make output from things that display progress like more readable in a log
file.

[kustermann, 2013/04/03 12:52:13]

Done.

     }
   }
   if (!test.lastCommandOutput.stderr.isEmpty) {
     output.add('');
     output.add('stderr:');
-    output.add(decodeUtf8(test.lastCommandOutput.stderr));
+    output.addAll(decodeUtf8(test.lastCommandOutput.stderr)
+        .replaceAll('\r\n', '\n').split('\n'));
   }
   if (test is BrowserTestCase) {
     // Additional command for rerunning the steps locally after the fact.