[Media Router] Wiring for searching route providers for new sinks.

chrome/browser/media/router/media_sinks_search_request.cc

+// Copyright 2016 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 "chrome/browser/media/router/media_sinks_search_request.h"
+
+namespace media_router {
+
+MediaSinksSearchRequest::MediaSinksSearchRequest(const MediaSource& source,
+                                                 const MediaSink::Id& sink_id)
+    : source_(source), sink_id_(sink_id) {}
+
+MediaSinksSearchRequest::~MediaSinksSearchRequest() {}
+
+}  // namespace media_router