[Media Router] Update Media Router flags post-launch.

chrome/test/media_router/media_router_base_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_base_browsertest.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/location.h"
 #include "base/path_service.h"
@@ skipping 15 matching lines @@
 // Command line argument to specify unpacked extension location.
 const char kExtensionUnpacked[] = "extension-unpacked";
 }  // namespace
 
 
 namespace media_router {
 
 MediaRouterBaseBrowserTest::MediaRouterBaseBrowserTest()
     : extension_load_event_(base::WaitableEvent::ResetPolicy::AUTOMATIC,
                             base::WaitableEvent::InitialState::NOT_SIGNALED),
-      extension_host_created_(false),
-      feature_override_(extensions::FeatureSwitch::media_router(), true) {
-  base::CommandLine::ForCurrentProcess()->AppendSwitchASCII(
-      switches::kEnableExperimentalWebPlatformFeatures, "Presentation");
+      extension_host_created_(false) {
 }
 
 MediaRouterBaseBrowserTest::~MediaRouterBaseBrowserTest() {
 }
 
 void MediaRouterBaseBrowserTest::SetUp() {
   ParseCommandLine();
   ExtensionBrowserTest::SetUp();
 }
 
@@ skipping 83 matching lines @@
     if (PathExists(extension_path)) {
       extension_unpacked_ = extension_path;
     }
   }
 
   // Exactly one of these two arguments should be provided.
   ASSERT_NE(extension_crx_.empty(), extension_unpacked_.empty());
 }
 
 }  // namespace media_router