Version 1.19.0-dev.2.1

Cherry-pick cd92d6a831b511adaabb8c40cfcb8e30bed8461e to dev
Cherry-pick 27e59484ea66bdeccd307e070bf49c1c7400d1a9 to dev
Cherry-pick cdb317d88b18c850577af9d51c073d845e7680b6 to dev
diff --git a/DEPS b/DEPS
index 700ff13..7e5e694 100644
--- a/DEPS
+++ b/DEPS
@@ -56,7 +56,7 @@
   "dart_services_rev" : "@7aea2574e6f3924bf409a80afb8ad52aa2be4f97",
   "dart_style_tag": "@0.2.4",
   "dartdoc_tag" : "@v0.9.6+2",
-  "dev_compiler_rev": "@d39946fd7af11d02a8831dbd7a2b776c69099ff6",
+  "dev_compiler_rev": "@1a946b210f9275a1dda1a79969f5dabdc8b7784b",
   "fixnum_tag": "@0.10.5",
   "func_rev": "@8d4aea75c21be2179cb00dc2b94a71414653094e",
   "glob_rev": "@704cf75e4f26b417505c5c611bdaacd8808467dd",
diff --git a/tools/VERSION b/tools/VERSION
index 59e58d0..f76290b 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -28,4 +28,4 @@
 MINOR 19
 PATCH 0
 PRERELEASE 2
-PRERELEASE_PATCH 0
+PRERELEASE_PATCH 1