Remove a conflicting definition of runningAsTest.

lib/src/io.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.
 
 /// Helper functionality to make working with IO easier.
 library pub.io;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:convert';
@@ skipping 546 matching lines @@
 
 /// Displays a message and reads a yes/no confirmation from the user.
 ///
 /// Returns a [Future] that completes to `true` if the user confirms or `false`
 /// if they do not.
 ///
 /// This will automatically append " (y/n)?" to the message, so [message]
 /// should just be a fragment like, "Are you sure you want to proceed".
 Future<bool> confirm(String message) {
   log.fine('Showing confirm message: $message');
-  if (runningAsTest) {
+  if (runningFromTest) {
     log.message("$message (y/n)?");
   } else {
     stdout.write(log.format("$message (y/n)? "));
   }
   return streamFirst(stdinLines)
       .then((line) => new RegExp(r"^[yY]").hasMatch(line));
 }
 
 /// Reads and discards all output from [stream].
 ///
@@ skipping 474 matching lines @@
 
   // TODO(rnystrom): Remove this and change to returning one string.
   static List<String> _toLines(String output) {
     var lines = splitLines(output);
     if (!lines.isEmpty && lines.last == "") lines.removeLast();
     return lines;
   }
 
   bool get success => exitCode == exit_codes.SUCCESS;
 }