Tighten up a bunch of types in test.dart.

tools/testing/dart/test_progress.dart

 // Copyright (c) 2013, 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.
 
 library test_progress;
 
 import "dart:convert" show JSON;
 import "dart:io";
 
 import "path.dart";
@@ skipping 215 matching lines @@
       if (!archivedBinaries.containsKey(binName) && binFile.existsSync()) {
         final mode = test.configuration['mode'];
         final arch = test.configuration['arch'];
         final archived = "binary.${mode}_${arch}_${binBaseName}";
         TestUtils.copyFile(new Path(binName), new Path(archived));
         archivedBinaries[binName] = archived;
       }
 
       if (archivedBinaries.containsKey(binName)) {
         // We have found and copied the binary.
-        var unexpectedCrashesFile;
+        RandomAccessFile unexpectedCrashesFile;
         try {
           unexpectedCrashesFile =
               new File('unexpected-crashes').openSync(mode: FileMode.APPEND);
           unexpectedCrashesFile.writeStringSync(
               "${test.displayName},${pid},${archivedBinaries[binName]}\n");
         } catch (e) {
           print('Failed to add crash to unexpected-crashes list: ${e}');
         } finally {
           try {
             if (unexpectedCrashesFile != null) {
@@ skipping 426 matching lines @@
 }
 
 String _buildSummaryEnd(int failedTests) {
   if (failedTests == 0) {
     return '\n===\n=== All tests succeeded\n===\n';
   } else {
     var pluralSuffix = failedTests != 1 ? 's' : '';
     return '\n===\n=== ${failedTests} test$pluralSuffix failed\n===\n';
   }
 }