Simplify/Cleanup MediaClient

chromecast/renderer/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")
 
 source_set("renderer") {
   sources = [
     "cast_content_renderer_client.cc",
     "cast_content_renderer_client.h",
     "cast_render_frame_action_deferrer.cc",
     "cast_render_frame_action_deferrer.h",
-    "key_systems_cast.cc",
-    "key_systems_cast.h",
   ]
 
   public_deps = [
     "//chromecast/renderer/media",
   ]
 
   if (chromecast_branding == "public") {
     sources += [ "cast_content_renderer_client_simple.cc" ]
   }
 
   if (use_playready) {
     configs += [ "//chromecast:playready_config" ]
   }
 
   deps = [
     "//base",
     "//chromecast/base",
     "//chromecast/common/media",
     "//chromecast/crash",
     "//chromecast/media",
     "//chromecast/media",
-    "//components/cdm/renderer",
     "//components/network_hints/renderer",
     "//content/public/common",
     "//content/public/renderer",
     "//crypto",
     "//ipc",
     "//media",
     "//services/service_manager/public/cpp",
-    "//third_party/widevine/cdm:headers",
   ]
 }