Ensures that audio tasks cannot run after AudioManager is deleted.

media/cast/BUILD.gn

 # Copyright 2014 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/android/config.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//third_party/protobuf/proto_library.gni")
 
@@ skipping 393 matching lines @@
       "test/receiver.cc",
     ]
     deps = [
       ":common",
       ":net",
       ":receiver",
       ":test_support",
       "//base",
       "//build/win:default_exe_manifest",
       "//media",
+      "//media/audio:test_support",
       "//net",
       "//ui/gfx/geometry",
     ]
 
     if (is_linux && !is_chromeos && use_x11) {
       sources += [
         "test/linux_output_window.cc",
         "test/linux_output_window.h",
       ]
       configs += [
@@ skipping 119 matching lines @@
     ":sender",
   ]
 }
 
 static_library("cast_receiver") {
   complete_static_lib = true
   deps = [
     ":receiver",
   ]
 }