Convert USE_PROPRIETARY_CODECS to a buildflag header.

components/cdm/common/widevine_drm_delegate_android.cc

 // 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.
 
 #include "components/cdm/common/widevine_drm_delegate_android.h"
 
 #include "base/macros.h"
 #include "media/cdm/cenc_utils.h"
+#include "media/media_features.h"
 
 namespace cdm {
 
 namespace {
 
 const uint8_t kWidevineUuid[16] = {
     0xED, 0xEF, 0x8B, 0xA9, 0x79, 0xD6, 0x4A, 0xCE,  //
     0xA3, 0xC8, 0x27, 0xDC, 0xD5, 0x1D, 0x21, 0xED};
 
 }  // namespace
 
 WidevineDrmDelegateAndroid::WidevineDrmDelegateAndroid() {}
 
 WidevineDrmDelegateAndroid::~WidevineDrmDelegateAndroid() {}
 
 const std::vector<uint8_t> WidevineDrmDelegateAndroid::GetUUID() const {
   return std::vector<uint8_t>(kWidevineUuid,
                               kWidevineUuid + arraysize(kWidevineUuid));
 }
 
 bool WidevineDrmDelegateAndroid::OnCreateSession(
     const media::EmeInitDataType init_data_type,
     const std::vector<uint8_t>& init_data,
     std::vector<uint8_t>* init_data_out,
     std::vector<std::string>* /* optional_parameters_out */) {
   if (init_data_type != media::EmeInitDataType::CENC)
     return true;
 
-#if defined(USE_PROPRIETARY_CODECS)
+#if BUILDFLAG(USE_PROPRIETARY_CODECS)
   // Widevine MediaDrm plugin only accepts the "data" part of the PSSH box as
   // the init data when using MP4 container.
   return media::GetPsshData(init_data, GetUUID(), init_data_out);
 #else
   return false;
 #endif
 }
 
 }  // namespace cdm