Dart SDK Spelling b, c, and d.

tools/testing/dart/runtime_configuration.dart

 // Copyright (c) 2014, 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 runtime_configuration;
 
 import 'dart:io' show Directory, File;
 
 import 'compiler_configuration.dart' show CommandArtifact;
 
@@ skipping 192 matching lines @@
     return multiplier;
   }
 }
 
 /// Runtime configuration for Content Shell.  We previously used a similar
 /// program named Dump Render Tree, hence the name.
 class DrtRuntimeConfiguration extends DartVmRuntimeConfiguration {
   int computeTimeoutMultiplier(
       {String mode, bool isChecked: false, bool isReload: false, String arch}) {
     return 4 // Allow additional time for browser testing to run.
-        // TODO(ahe): We might need to distinquish between DRT for running
+        // TODO(ahe): We might need to distinguish between DRT for running
         // JavaScript and Dart code.  I'm not convinced the inherited timeout
         // multiplier is relevant for JavaScript.
         *
         super.computeTimeoutMultiplier(
             mode: mode, isChecked: isChecked, isReload: isReload);
   }
 }
 
 /// The standalone Dart VM binary, "dart" or "dart.exe".
 class StandaloneDartRuntimeConfiguration extends DartVmRuntimeConfiguration {
@@ skipping 133 matching lines @@
 class DummyRuntimeConfiguration extends DartVmRuntimeConfiguration {
   List<Command> computeRuntimeCommands(
       TestSuite suite,
       CommandBuilder commandBuilder,
       CommandArtifact artifact,
       List<String> arguments,
       Map<String, String> environmentOverrides) {
     throw "Unimplemented runtime '$runtimeType'";
   }
 }