anchor.diff:      // Issue 26739
       if (zygoteCrash.hasMatch(stderr)) {
         DebugLogger.warning("Warning: Failure because of content_shell "
  -                           "zygote crash. Test ignored");
  +          "zygote crash. Test ignored");
         return true;
       }
       return false;
  
positive.code:     // All closures are of type "Future<AdbCommandResult> run()"
      List<Function> steps = [];
  
      steps.add(() => device.runAdbShellCommand(
            ['rm', '-Rf', deviceTestDir]));
      steps.add(() => device.runAdbShellCommand(
            ['mkdir', '-p', deviceTestDir]));
      // TODO: We should find a way for us to cache the runner binary and avoid
      // pushhing it for every single test (this is bad for SSD cycle time, test
      // timing).
      steps.add(() => device.runAdbCommand(
            ['push', runner, '$devicedir/dart_precompiled_runtime']));
      steps.add(() => device.runAdbShellCommand(
            ['chmod', '777', '$devicedir/dart_precompiled_runtime']));
  
      for (var file in files) {
        steps.add(() => device.runAdbCommand(
              ['push', '$testdir/$file', '$deviceTestDir/$file']));
      }
  
      if (command.useBlobs) {
        steps.add(() => device.runAdbShellCommand(
              ['$devicedir/dart_precompiled_runtime',
               '--run-app-snapshot=$deviceTestDir',
               '--use-blobs']..addAll(arguments),
              timeout: timeoutDuration));
      } else {
        steps.add(() => device.runAdbShellCommand(
              ['$devicedir/dart_precompiled_runtime',
               '--run-app-snapshot=$deviceTestDir'
               ]..addAll(arguments),
              timeout: timeoutDuration));
      }
  
      var stopwatch = new Stopwatch()..start();
  
negative.code:   }
  
    AdbPrecompilationCommand getAdbPrecompiledCommand(String precompiledRunner,
        String testDirectory, List<String> arguments, bool useBlobs) {
      var command = new AdbPrecompilationCommand._(
          precompiledRunner, testDirectory, arguments, useBlobs);
      return _getUniqueCommand(command);
  