[Media Router] Design MediaRouter interface with stub implementation.

chrome/browser/media/router/media_route_response.cc

Index: chrome/browser/media/router/media_route_response.cc
diff --git a/chrome/browser/media/router/media_route_response.cc b/chrome/browser/media/router/media_route_response.cc
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+++ b/chrome/browser/media/router/media_route_response.cc
@@ -0,0 +1,36 @@
+// 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 "chrome/browser/media/router/media_route_response.h"
+
+namespace media_router {
+
+// static
+scoped_ptr<MediaRouteResponse> MediaRouteResponse::CreateFromSuccess(
+    const RouteRequestId& request_id,
+    const MediaRoute& route) {
+  return make_scoped_ptr(new MediaRouteResponse(request_id, route));
+}
+
+// static
+scoped_ptr<MediaRouteResponse> MediaRouteResponse::CreateFromError(
+    const RouteRequestId& request_id,
+    const std::string& error) {
+  return make_scoped_ptr(new MediaRouteResponse(request_id, error));
+}
+
+MediaRouteResponse::~MediaRouteResponse() {
+}
+
+MediaRouteResponse::MediaRouteResponse(const RouteRequestId& request_id,
+                                       const MediaRoute& route)
+    : request_id_(request_id), route_(new MediaRoute(route)) {
+}
+
+MediaRouteResponse::MediaRouteResponse(const RouteRequestId& request_id,
+                                       const std::string& error)
+    : request_id_(request_id), error_(error) {
+}
+
+}  // namespace media_router