Fix compiler==none case in browser testing (Dartium case)

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 751cbcf27344ab6824234bb76ae69fcc98a6ef69..887f82dd33adf26efeafc0426b12f55a52aad1c3 100644
--- a/tools/testing/dart/test_suite.dart
+++ b/tools/testing/dart/test_suite.dart
@@ -1125,7 +1125,7 @@ class StandardTestSuite extends TestSuite {
       }
       scriptPath = _createUrlPathFromFile(new Path(scriptPath));
 
-      if (configuration.compiler == Compiler.dart2js) {
+      if (configuration.compiler != Compiler.dartdevc) {
         content = getHtmlContents(fileName, scriptType, scriptPath);
       } else {
         var jsDir = new Path(compilationTempDir)
@@ -1149,6 +1149,9 @@ class StandardTestSuite extends TestSuite {
             '$compilationTempDir/$nameNoExt.js', optionsFromFile));
         break;
 
+      case Compiler.none:
+        break;
+
       default:
         assert(false);
     }