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