Update remaining usages of Completer.completeException.

tools/release/version.dart

 // Copyright (c) 2012, 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.
 
 /**
  * This file contains functionality for getting dart version numbers using
  * our standard version construction method. Systems that does not include this
  * file should emulate the structure for revision numbers that we have here.
  *
  * The version number of a dart build is constructed as follows:
@@ skipping 31 matching lines @@
   /**
    * Get the version number for this specific build using the version info
    * from the VERSION file in the root directory and the revision info
    * from the source control system of the current checkout.
    */
   Future<String> getVersion() {
     File f = new File(_versionFileName);
     Completer c = new Completer();
     f.exists().then((existed) {
       if (!existed) {
-        c.completeException("No VERSION file");
+        c.completeError("No VERSION file");
         return;
       }
       StringInputStream input = new StringInputStream(f.openInputStream());
       input.onLine = () {
         var line = input.readLine().trim();
         if (line == null) {
-          c.completeException(
+          c.completeError(
               "VERSION input file seems to be in the wrong format");
           return;
         }
         var values = line.split(" ");
         if (values.length != 2) {
-          c.completeException(
+          c.completeError(
               "VERSION input file seems to be in the wrong format");
           return;
         }
         var number = 0;
         try {
           number = int.parse(values[1]);
         } catch (e) {
-          c.completeException("Can't parse version numbers, not an int");
+          c.completeError("Can't parse version numbers, not an int");
           return;
         }
         switch (values[0]) {
           case "MAJOR":
             MAJOR = number;
             break;
           case "MINOR":
             MINOR = number;
             break;
           case "BUILD":
             BUILD = number;
             break;
           case "PATCH":
             PATCH = number;
             break;
           default:
-            c.completeException("Wrong format in VERSION file, line does not "
-                                "contain one of {MAJOR, MINOR, BUILD, PATCH}");
+            c.completeError("Wrong format in VERSION file, line does not "
+                            "contain one of {MAJOR, MINOR, BUILD, PATCH}");
             return;
         }
       };
       input.onClosed = () {
         // Only complete if we did not already complete with a failure.
         if (!c.future.isComplete) {
           getRevision().then((revision) {
             REVISION = revision;
             USERNAME = getUserName();
             var userNameString = "";
@@ skipping 104 matching lines @@
   static RepositoryType guessType() {
     if (new Directory(".svn").existsSync()) return RepositoryType.SVN;
     if (new Directory(".git").existsSync()) return RepositoryType.GIT;
     return RepositoryType.UNKNOWN;
   }
 
   String toString() => name;
 
   final String name;
 }