Move ENABLE_PEPPER_CDMS to a buildflag header.

components/cdm/renderer/external_clear_key_key_system_properties.cc

 // Copyright 2016 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/renderer/external_clear_key_key_system_properties.h"
 
 #include "base/logging.h"
 #include "media/base/eme_constants.h"
+#include "ppapi/features/features.h"
 
 namespace cdm {
 
-#if defined(ENABLE_PEPPER_CDMS)
+#if BUILDFLAG(ENABLE_PEPPER_CDMS)
 const char kExternalClearKeyPepperType[] = "application/x-ppapi-clearkey-cdm";
 #endif
 
 ExternalClearKeyProperties::ExternalClearKeyProperties(
     const std::string& key_system_name)
     : key_system_name_(key_system_name) {}
 
 ExternalClearKeyProperties::~ExternalClearKeyProperties() {}
 
 std::string ExternalClearKeyProperties::GetKeySystemName() const {
@@ skipping 50 matching lines @@
 media::EmeFeatureSupport ExternalClearKeyProperties::GetPersistentStateSupport()
     const {
   return media::EmeFeatureSupport::REQUESTABLE;
 }
 
 media::EmeFeatureSupport
 ExternalClearKeyProperties::GetDistinctiveIdentifierSupport() const {
   return media::EmeFeatureSupport::NOT_SUPPORTED;
 }
 
-#if defined(ENABLE_PEPPER_CDMS)
+#if BUILDFLAG(ENABLE_PEPPER_CDMS)
 std::string ExternalClearKeyProperties::GetPepperType() const {
   return kExternalClearKeyPepperType;
 }
 #endif
 
 }  // namespace cdm