Revert of Move ENABLE_PEPPER_CDMS to a buildflag header.

components/cdm/renderer/widevine_key_system_properties.cc

Index: components/cdm/renderer/widevine_key_system_properties.cc
diff --git a/components/cdm/renderer/widevine_key_system_properties.cc b/components/cdm/renderer/widevine_key_system_properties.cc
index 47b7103b0443f54dc4e7793941775615461683ce..bb08615597e825722826e39238776baddad3763d 100644
--- a/components/cdm/renderer/widevine_key_system_properties.cc
+++ b/components/cdm/renderer/widevine_key_system_properties.cc
@@ -4,7 +4,6 @@
 
 #include "components/cdm/renderer/widevine_key_system_properties.h"
 
-#include "ppapi/features/features.h"
 #include "widevine_cdm_version.h"  // In SHARED_INTERMEDIATE_DIR.
 
 #if defined(WIDEVINE_CDM_AVAILABLE)
@@ -166,7 +165,7 @@
   return distinctive_identifier_support_;
 }
 
-#if BUILDFLAG(ENABLE_PEPPER_CDMS)
+#if defined(ENABLE_PEPPER_CDMS)
 std::string WidevineKeySystemProperties::GetPepperType() const {
   return kWidevineCdmPluginMimeType;
 }