Move ENABLE_PEPPER_CDMS to a buildflag header.

content/renderer/media/cdm/pepper_cdm_wrapper.h

 // 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.
 
 #ifndef CONTENT_RENDERER_MEDIA_CDM_PEPPER_CDM_WRAPPER_H_
 #define CONTENT_RENDERER_MEDIA_CDM_PEPPER_CDM_WRAPPER_H_
 
-#if !defined(ENABLE_PEPPER_CDMS)
+#include "ppapi/features/features.h"
+
+#if !BUILDFLAG(ENABLE_PEPPER_CDMS)
 #error This file should only be included when ENABLE_PEPPER_CDMS is defined
 #endif
 
 #include <memory>
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
 
 class GURL;
@@ skipping 19 matching lines @@
 // Callback used to create a PepperCdmWrapper. This may return null if the
 // Pepper CDM can not be created.
 typedef base::Callback<std::unique_ptr<PepperCdmWrapper>(
     const std::string& pluginType,
     const GURL& security_origin)>
     CreatePepperCdmCB;
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_CDM_PEPPER_CDM_WRAPPER_H_