Temporarily use older protobuf library.

BUG=3106
R=mflodman@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/10609004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5774 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/DEPS b/DEPS
index 6ff121e..9580517 100644
--- a/DEPS
+++ b/DEPS
@@ -90,7 +90,7 @@
     Var("chromium_trunk") + "/deps/third_party/opus@239448",
 
   "third_party/protobuf":
-    Var("chromium_trunk") + "/src/third_party/protobuf@" + Var("chromium_revision"),
+    Var("chromium_trunk") + "/src/third_party/protobuf@251211",
 
   "third_party/sqlite/":
     Var("chromium_trunk") + "/src/third_party/sqlite@" + Var("chromium_revision"),