Revert of Move ENABLE_PEPPER_CDMS to a buildflag header.

content/renderer/media/cdm/render_cdm_factory.h

Index: content/renderer/media/cdm/render_cdm_factory.h
diff --git a/content/renderer/media/cdm/render_cdm_factory.h b/content/renderer/media/cdm/render_cdm_factory.h
index 1a9f361a8ea06f6243b83e1f01a9c42b88b10416..1b03c4017a6b8baba9e79b35d8f68134f711059c 100644
--- a/content/renderer/media/cdm/render_cdm_factory.h
+++ b/content/renderer/media/cdm/render_cdm_factory.h
@@ -12,9 +12,8 @@
 #include "base/threading/thread_checker.h"
 #include "media/base/cdm_factory.h"
 #include "media/base/media_keys.h"
-#include "ppapi/features/features.h"
 
-#if BUILDFLAG(ENABLE_PEPPER_CDMS)
+#if defined(ENABLE_PEPPER_CDMS)
 #include "content/renderer/media/cdm/pepper_cdm_wrapper.h"
 #endif
 
@@ -30,11 +29,11 @@
 // and should only be used on one thread.
 class RenderCdmFactory : public media::CdmFactory {
  public:
-#if BUILDFLAG(ENABLE_PEPPER_CDMS)
+#if defined(ENABLE_PEPPER_CDMS)
   explicit RenderCdmFactory(const CreatePepperCdmCB& create_pepper_cdm_cb);
 #else
   RenderCdmFactory();
-#endif  // BUILDFLAG(ENABLE_PEPPER_CDMS)
+#endif  // defined(ENABLE_PEPPER_CDMS)
 
   ~RenderCdmFactory() override;
 
@@ -50,7 +49,7 @@
       const media::CdmCreatedCB& cdm_created_cb) override;
 
  private:
-#if BUILDFLAG(ENABLE_PEPPER_CDMS)
+#if defined(ENABLE_PEPPER_CDMS)
   CreatePepperCdmCB create_pepper_cdm_cb_;
 #endif