media: Remove Browser CDM implementation

build/config/features.gni

 # 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.
 
 # =============================================
 #   PLEASE DO NOT ADD MORE FLAGS TO THIS FILE
 # =============================================
 #
 # These flags are effectively global. Your feature flag should go near the
 # code it controls. Most of these items are here now because they control
@@ skipping 49 matching lines @@
   enable_session_service = !is_android && !is_ios && !is_chromecast
 
   enable_plugin_installation = is_win || is_mac
 
   enable_app_list = is_chromeos
 
   enable_supervised_users = !is_ios && !is_chromecast
 
   enable_remoting = !is_ios && !is_chromecast
 
-  # Enables browser side Content Decryption Modules. Required for embedders
-  # (e.g. Android and ChromeCast) that use a browser side CDM.
-  enable_browser_cdms = is_android || is_chromecast
-
   # Hangout services is an extension that adds extra features to Hangouts.
   # For official GYP builds, this flag is set.
   enable_hangout_services_extension = false
 
   # Variable safe_browsing is used to control the build time configuration for
   # safe browsing feature. Safe browsing can be compiled in 3 different levels:
   # 0 disables it, 1 enables it fully, and 2 enables mobile protection via an
   # external API.
   if (is_ios || is_chromecast) {
     safe_browsing_mode = 0
@@ skipping 94 matching lines @@
 
 enable_configuration_policy = !is_ios
 
 enable_mac_keystone = is_mac && is_chrome_branded && is_official_build
 #
 # =============================================
 #   PLEASE DO NOT ADD MORE FLAGS TO THIS FILE
 # =============================================
 #
 # See comment at the top.