Version 1.2.0 (stable channel)

Fixup VERSION file and DEPS files for the 1.2 branch.

R=kasperl@google.com

Review URL: https://codereview.chromium.org//177533011

git-svn-id: http://dart.googlecode.com/svn/branches/1.2@33014 260f80e4-7a28-3924-810f-c04153c831b5
diff --git a/tools/VERSION b/tools/VERSION
index 2d4e26f..0fc6d04 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -23,9 +23,9 @@
 #  * Making cherry-picks to stable channel
 #     - increase PATCH by 1
 #
-CHANNEL dev
+CHANNEL stable
 MAJOR 1
 MINOR 2
 PATCH 0
-PRERELEASE 5
-PRERELEASE_PATCH 15
+PRERELEASE 0
+PRERELEASE_PATCH 0