[Chromecast] Use base::FeatureList to control features.

chromecast/browser/BUILD.gn

 # 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.
 
 import("//build/config/ui.gni")
 import("//chromecast/chromecast.gni")
 import("//services/service_manager/public/service_manifest.gni")
 import("//testing/test.gni")
 import("//tools/grit/grit_rule.gni")
 
@@ skipping 228 matching lines @@
     "//content/public/common",
     "//testing/gtest",
   ]
 }
 
 source_set("browsertests") {
   testonly = true
   sources = [
     "cast_media_blocker_browsertest.cc",
     "renderer_prelauncher_test.cc",
+    "test/cast_features_browsertest.cc",
     "test/cast_navigation_browsertest.cc",
   ]
 
   defines = [ "HAS_OUT_OF_PROC_TEST_RUNNER" ]
 
   deps = [
     ":test_support",
     "//chromecast:chromecast_features",
+    "//chromecast/base",
     "//chromecast/base:chromecast_switches",
     "//chromecast/base/metrics",
+    "//components/prefs",
     "//media/base:test_support",
   ]
 }
 
 source_set("unittests") {
   testonly = true
 
   sources = [
     "cast_media_blocker_unittest.cc",
     "devtools/cast_devtools_manager_delegate_unittest.cc",
@@ skipping 15 matching lines @@
       "android/apk/src/org/chromium/chromecast/shell/CastContentWindowAndroid.java",
       "android/apk/src/org/chromium/chromecast/shell/CastCrashHandler.java",
       "android/apk/src/org/chromium/chromecast/shell/CastMetricsHelper.java",
       "android/apk/src/org/chromium/chromecast/shell/CastSysInfoAndroid.java",
       "android/apk/src/org/chromium/chromecast/shell/CastWebContentsActivity.java",
     ]
 
     jni_package = "chromecast"
   }
 }