Use lower-case JIDs when generating signatures for messages sent to CRD bot.

remoting/signaling/jid_util.cc

Index: remoting/signaling/jid_util.cc
diff --git a/remoting/signaling/jid_util.cc b/remoting/signaling/jid_util.cc
new file mode 100644
index 0000000000000000000000000000000000000000..8e8e12bb8788da5d03eb93f8046d190907c03caf
--- /dev/null
+++ b/remoting/signaling/jid_util.cc
@@ -0,0 +1,23 @@
+// Copyright 2015 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.
+
+#include "remoting/signaling/jid_util.h"
+
+#include "base/strings/string_util.h"
+
+namespace remoting {
+
+std::string NormalizeJid(const std::string& jid) {
+  size_t slash_pos = jid.find('/');
+
+  // In case there the jid doesn't have resource id covert the whole value to
+  // lower-case.
+  if (slash_pos == std::string::npos)
+    return base::StringToLowerASCII(jid);
+
+  return base::StringToLowerASCII(jid.substr(0, slash_pos)) +
+         jid.substr(slash_pos);
+}
+
+}  // namespace remoting