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

components/proximity_auth/webui/url_constants.h

Index: components/proximity_auth/webui/url_constants.h
diff --git a/components/proximity_auth/webui/url_constants.h b/components/proximity_auth/webui/url_constants.h
new file mode 100644
index 0000000000000000000000000000000000000000..340add3576b9f16134e05d1e25b75f9448b2c084
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+++ b/components/proximity_auth/webui/url_constants.h
@@ -0,0 +1,15 @@
+// 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.
+
+#ifndef COMPONENTS_PROXIMITY_AUTH_WEBUI_URL_CONSTANTS_H_
+#define COMPONENTS_PROXIMITY_AUTH_WEBUI_URL_CONSTANTS_H_
+
+namespace proximity_auth {
+
+extern const char kChromeUIProximityAuthHost[];
+extern const char kChromeUIProximityAuthURL[];
+
+}  // namespace dom_distiller
+
+#endif  // COMPONENTS_PROXIMITY_AUTH_WEBUI_URL_CONSTANTS_H_