Pass origin to StartObservingMediaSinks.

chrome/test/media_router/media_router_e2e_browsertest.cc

 // 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/test/media_router/media_router_e2e_browsertest.h"
 
 #include <vector>
 #include "base/command_line.h"
 #include "base/stl_util.h"
 #include "base/strings/stringprintf.h"
@@ skipping 65 matching lines @@
     const std::string& error) {
   ASSERT_TRUE(route);
   route_id_ = route->media_route_id();
 }
 
 void MediaRouterE2EBrowserTest::CreateMediaRoute(
     const MediaSource& source,
     const GURL& origin,
     content::WebContents* web_contents) {
   DCHECK(media_router_);
-  observer_.reset(new TestMediaSinksObserver(media_router_, source));
+  observer_.reset(new TestMediaSinksObserver(media_router_, source, origin));
   observer_->Init();
 
   DVLOG(1) << "Receiver name: " << receiver();
   // Wait for MediaSinks compatible with |source| to be discovered.
   ASSERT_TRUE(ConditionalWait(
       base::TimeDelta::FromSeconds(30), base::TimeDelta::FromSeconds(1),
       base::Bind(&MediaRouterE2EBrowserTest::IsSinkDiscovered,
                  base::Unretained(this))));
 
   const auto& sink_map = observer_->sink_map;
@@ skipping 65 matching lines @@
   CreateMediaRoute(MediaSourceForPresentationUrl(kCastAppPresentationUrl),
                    GURL(kOriginUrl), nullptr);
   Wait(base::TimeDelta::FromSeconds(30));
 
   // Wait for 10 seconds to make sure route has been stopped.
   StopMediaRoute();
   Wait(base::TimeDelta::FromSeconds(10));
 }
 
 }  // namespace media_router