Double the timeout for JUnit tests in dartc

tools/testing/dart/test_suite.dart

Index: tools/testing/dart/test_suite.dart
diff --git a/tools/testing/dart/test_suite.dart b/tools/testing/dart/test_suite.dart
index fa06f77db9a157e6b77b55d65faaa6d671bbfd41..7c8b7472d4be0f8213af039bbe3e82f06f4b06be 100644
--- a/tools/testing/dart/test_suite.dart
+++ b/tools/testing/dart/test_suite.dart
@@ -1128,10 +1128,17 @@ class JUnitTestSuite implements TestSuite {
             dartDir + '/tools/test.py',
         'org.junit.runner.JUnitCore'];
     args.addAll(testClasses);
-
+    
+    // Lengthen the timeout for JUnit tests.  It is normal for them
+    // to run for a few minutes.
+    Map updatedConfiguration = new Map();

[Bill Hesse, 2012/04/10 10:50:56]

Why not new Map.from(configuration)?

+    configuration.forEach((key, value) {
+      updatedConfiguration[key] = value;
+    });
+    updatedConfiguration['timeout'] *= 2;
     doTest(new TestCase(suiteName,
                         [new Command('java', args)],
-                        configuration,
+                        updatedConfiguration,
                         completeHandler,
                         new Set<String>.from([PASS])));
     doDone();