chrome: Use stl utilities from the base namespace

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 99 matching lines @@
       base::Bind(&MediaRouterE2EBrowserTest::IsRouteCreated,
                  base::Unretained(this))));
 }
 
 void MediaRouterE2EBrowserTest::StopMediaRoute() {
   ASSERT_FALSE(route_id_.empty());
   media_router_->TerminateRoute(route_id_);
 }
 
 bool MediaRouterE2EBrowserTest::IsSinkDiscovered() const {
-  return ContainsKey(observer_->sink_map, receiver());
+  return base::ContainsKey(observer_->sink_map, receiver());
 }
 
 bool MediaRouterE2EBrowserTest::IsRouteCreated() const {
   return !route_id_.empty();
 }
 
 void MediaRouterE2EBrowserTest::OpenMediaPage() {
   base::StringPairs query_params;
   query_params.push_back(std::make_pair(kVideo, kBearVP9Video));
   std::string query = media::GetURLQueryString(query_params);
@@ skipping 30 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