Pepper: Finish support for dev channel APIs.

ppapi/thunk/interfaces_ppb_public_dev_channel.h

Index: ppapi/thunk/interfaces_ppb_public_dev_channel.h
diff --git a/ppapi/thunk/interfaces_ppb_public_dev_channel.h b/ppapi/thunk/interfaces_ppb_public_dev_channel.h
new file mode 100644
index 0000000000000000000000000000000000000000..a70442b945d7ae3cb25df78f37bd35f53e4dc105
--- /dev/null
+++ b/ppapi/thunk/interfaces_ppb_public_dev_channel.h
@@ -0,0 +1,12 @@
+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Please see inteface_ppb_public_stable for the documentation on the format of
+// this file.
+
+#include "ppapi/thunk/interfaces_preamble.h"
+
+// Interfaces go here.
+
+#include "ppapi/thunk/interfaces_postamble.h"