dart2js: fix csp mode when minifying.

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 ae57aee054d9dbf55021ff14d7d8b4dad141240f..2e97c0570c73a14d84f82e7ebd66973115a6043e 100644
--- a/tools/testing/dart/test_suite.dart
+++ b/tools/testing/dart/test_suite.dart
@@ -1469,7 +1469,6 @@ class StandardTestSuite extends TestSuite {
       packageRootArgument(optionsFromFile['packageRoot']);
     if (packageRoot != null) args.add(packageRoot);
     args.add('--out=$outputFile');
-    if (configuration['csp']) args.add('--csp');
     args.add(inputFile);
     List<String> options = optionsFromFile['sharedOptions'];
     if (options != null) args.addAll(options);
@@ -2220,6 +2219,9 @@ class TestUtils {
         configuration["minified"]) {
       args.add("--minify");
     }
+    if (compiler == "dart2js" && configuration["csp"]) {
+      args.add("--csp");
+    }
     if (compiler == "dartanalyzer" || compiler == "dart2analyzer") {
       args.add("--show-package-warnings");
       args.add("--enable-async");