Add new chrome://proximity-auth WebUI for debugging Smart Lock.

components/proximity_auth/webui/proximity_auth_webui_handler.cc

Index: components/proximity_auth/webui/proximity_auth_webui_handler.cc
diff --git a/components/proximity_auth/webui/proximity_auth_webui_handler.cc b/components/proximity_auth/webui/proximity_auth_webui_handler.cc
new file mode 100644
index 0000000000000000000000000000000000000000..3d81f66a32fca2222386e62b56fad9cc88ba2fe1
--- /dev/null
+++ b/components/proximity_auth/webui/proximity_auth_webui_handler.cc
@@ -0,0 +1,18 @@
+// 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 "components/proximity_auth/webui/proximity_auth_webui_handler.h"
+
+namespace proximity_auth {
+
+ProximityAuthWebUIHandler::ProximityAuthWebUIHandler() {
+}
+
+ProximityAuthWebUIHandler::~ProximityAuthWebUIHandler() {
+}
+
+void ProximityAuthWebUIHandler::RegisterMessages() {
+}
+
+}  // namespace proximity_auth