[Media Router] Convert to use typemaps for media_router.mojom.

chrome/browser/media/router/route_request_result.h

 // 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.
 
 #ifndef CHROME_BROWSER_MEDIA_ROUTER_ROUTE_REQUEST_RESULT_H_
 #define CHROME_BROWSER_MEDIA_ROUTER_ROUTE_REQUEST_RESULT_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 34 matching lines @@
     INVALID_ORIGIN = 5,
     INCOGNITO_MISMATCH = 6,
     NO_SUPPORTED_PROVIDER = 7,
     CANCELLED = 8,
     // New values must be added here.
 
     TOTAL_COUNT = 9 // The total number of values.
   };
 
   static std::unique_ptr<RouteRequestResult> FromSuccess(
-      std::unique_ptr<MediaRoute> route,
+      const MediaRoute& route,
       const std::string& presentation_id);
   static std::unique_ptr<RouteRequestResult> FromError(const std::string& error,
                                                        ResultCode result_code);
+  RouteRequestResult(std::unique_ptr<MediaRoute> route,
+                     const std::string& presentation_id,
+                     const std::string& error,
+                     ResultCode result_code);
 
   ~RouteRequestResult();
 
   // Note the caller does not own the returned MediaRoute. The caller must
   // create a copy if they wish to use it after this object is destroyed.
   const MediaRoute* route() const { return route_.get(); }
   std::string presentation_id() const { return presentation_id_; }
   GURL presentation_url() const { return presentation_url_; }
   std::string error() const { return error_; }
   ResultCode result_code() const { return result_code_; }
 
  private:
-  RouteRequestResult(std::unique_ptr<MediaRoute> route,
-                     const std::string& presentation_id,
-                     const std::string& error,
-                     ResultCode result_code);
-
   std::unique_ptr<MediaRoute> route_;
   std::string presentation_id_;
   GURL presentation_url_;
   std::string error_;
   ResultCode result_code_;
 
   DISALLOW_COPY_AND_ASSIGN(RouteRequestResult);
 };
 
 }  // namespace media_router
 
 #endif  // CHROME_BROWSER_MEDIA_ROUTER_ROUTE_REQUEST_RESULT_H_