Fix CCTestSuite in test.dart.

tools/testing/dart/test_suite.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 enumerating and preparing tests.
  *
  * This library includes:
  *
  * - Creating tests by listing all the Dart files in certain directories,
@@ skipping 47 matching lines @@
   void forEachTest(TestCaseEvent onTest, Map testCache, [VoidFunction onDone]);
 }
 
 
 // TODO(1030): remove once in the corelib.
 bool Contains(element, collection) => collection.indexOf(element) >= 0;
 
 
 void ccTestLister() {
   port.receive((String runnerPath, SendPort replyTo) {
-    void processErrorHandler(error) {
-    }
     Future processFuture = Process.start(runnerPath, ["--list"]);
     processFuture.then((p) {
       StringInputStream stdoutStream = new StringInputStream(p.stdout);
-      List<String> tests = new List<String>();
+      var streamDone = false;
+      var processExited = false;
+      checkDone() {
+        if (streamDone && processExited) {
+          replyTo.send("");
+        }
+      }
       stdoutStream.onLine = () {
         String line = stdoutStream.readLine();
-        while (line != null) {
-          tests.add(line);
-          line = stdoutStream.readLine();
-        }
+        replyTo.send(line);
+      };
+      stdoutStream.onClosed = () {
+        streamDone = true;
+        checkDone();
       };
       p.onExit = (code) {
         if (code < 0) {
           print("Failed to list tests: $runnerPath --list");
           replyTo.send("");
+        } else {
+          processExited = true;
+          checkDone();
         }
-        for (String test in tests) {
-          replyTo.send(test);
-        }
-        replyTo.send("");
       };
       port.close();
     });
     processFuture.handleException((e) {
       print("Failed to list tests: $runnerPath --list");
       replyTo.send("");
       return true;
     });
   });
 }
@@ skipping 1375 matching lines @@
  * $noCrash tests are expected to be flaky but not crash
  * $pass tests are expected to pass
  * $failOk tests are expected to fail that we won't fix
  * $fail tests are expected to fail that we should fix
  * $crash tests are expected to crash that we should fix
  * $timeout tests are allowed to timeout
 """;
     print(report);
    }
 }