Remove prefixed EME.

media/base/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/arm.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/config/linux/pkg_config.gni")
 import("//media/media_options.gni")
@@ skipping 89 matching lines @@
     "demuxer_stream_provider.cc",
     "demuxer_stream_provider.h",
     "djb2.cc",
     "djb2.h",
     "eme_constants.h",
     "key_system_info.cc",
     "key_system_info.h",
     "key_systems.cc",
     "key_systems.h",
     "key_systems.h",
-    "key_systems_support_uma.cc",
-    "key_systems_support_uma.h",
     "loopback_audio_converter.cc",
     "loopback_audio_converter.h",
     "media.cc",
     "media.h",
     "media_client.cc",
     "media_client.h",
     "media_keys.cc",
     "media_keys.h",
     "media_log.cc",
     "media_log.h",
@@ skipping 428 matching lines @@
 }
 
 fuzzer_test("media_container_names_fuzzer") {
   sources = [
     "container_names_fuzzertest.cc",
   ]
   deps = [
     "//media",
   ]
 }