[Chromecast] Adds Browser test for media playback

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("//chromecast/chromecast.gni")
 import("//media/media_options.gni")
 import("//testing/test.gni")
 
 source_set("browser") {
   sources = [
@@ skipping 144 matching lines @@
 test("cast_shell_browser_test") {
   sources = [
     "test/chromecast_shell_browser_test.cc",
   ]
 
   configs += [ ":browser_test_config" ]
 
   deps = [
     ":test_support",
     "//base",
+    "//content/test:test_support",
+    "//media/base:test_support",
     "//testing/gtest",
     "//url",
   ]
 
   # TODO(slan): Find a better way to do this.
   if (chromecast_branding != "public") {
     deps += [ "//chromecast/internal:cast_shell_internal" ]
   }
 }