Move ENABLE_PEPPER_CDMS to a buildflag header.

media/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/buildflag_header.gni")
 import("//build/config/android/config.gni")
 import("//build/config/arm.gni")
 import("//build/config/features.gni")
 import("//build/config/linux/pkg_config.gni")
 import("//build/config/ui.gni")
 import("//media/media_options.gni")
 import("//testing/libfuzzer/fuzzer_test.gni")
 import("//testing/test.gni")
 import("//third_party/ffmpeg/ffmpeg_options.gni")
+import("//third_party/widevine/cdm/widevine.gni")
 
 buildflag_header("media_features") {
   header = "media_features.h"
 
   flags = [
     "ENABLE_AC3_EAC3_AUDIO_DEMUXING=$enable_ac3_eac3_audio_demuxing",
     "ENABLE_HEVC_DEMUXING=$enable_hevc_demuxing",
     "ENABLE_MSE_MPEG2TS_STREAM_PARSER=$enable_mse_mpeg2ts_stream_parser",
   ]
 }
@@ skipping 574 matching lines @@
     "//media/audio:test_support",
     "//media/audio:unittests",
     "//media/base:test_support",
     "//media/base:unittests",
     "//media/test:pipeline_integration_tests",
     "//skia",  # Direct dependency required to inherit config.
     "//testing/gmock",
     "//testing/gtest",
     "//third_party/libwebm",
     "//third_party/libyuv",
+    "//third_party/widevine/cdm:cdm_features",
     "//third_party/widevine/cdm:version_h",
     "//ui/gfx:test_support",
     "//url",
   ]
 
   data_deps = []
 
   if (is_android) {
     sources -= [
       "filters/decrypting_audio_decoder_unittest.cc",
@@ skipping 282 matching lines @@
 fuzzer_test("media_webm_muxer_fuzzer") {
   sources = [
     "muxers/webm_muxer_fuzzertest.cc",
   ]
   deps = [
     ":media",
     "//base",
     "//third_party/libwebm",
   ]
 }