Version 1.5.0-dev.4.23

Apply patch from https://codereview.chromium.org/354583002

git-svn-id: http://dart.googlecode.com/svn/trunk@37639 260f80e4-7a28-3924-810f-c04153c831b5
diff --git a/pkg/barback/pubspec.yaml b/pkg/barback/pubspec.yaml
index 048b3d0..53666e3 100644
--- a/pkg/barback/pubspec.yaml
+++ b/pkg/barback/pubspec.yaml
@@ -7,7 +7,7 @@
 #
 # When the minor or patch version of this is upgraded, you *must* update that
 # version constraint in pub to stay in sync with this.
-version: 0.14.1+1
+version: 0.14.1-dev
 
 author: "Dart Team <misc@dartlang.org>"
 homepage: http://www.dartlang.org
diff --git a/tools/VERSION b/tools/VERSION
index 3c64589..57df64f 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -28,4 +28,4 @@
 MINOR 5
 PATCH 0
 PRERELEASE 4
-PRERELEASE_PATCH 22
+PRERELEASE_PATCH 23