Move ENABLE_PEPPER_CDMS to a buildflag header.

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index 096178bc478602062e296a870d92c7a362397750..9309cd4060cf694e74a27639f6ed99ccbf53c92b 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -200,6 +200,7 @@
 #include "third_party/WebKit/public/web/WebUserGestureIndicator.h"
 #include "third_party/WebKit/public/web/WebView.h"
 #include "third_party/WebKit/public/web/WebWidget.h"
+#include "third_party/widevine/cdm/cdm_features.h"
 #include "url/url_constants.h"
 #include "url/url_util.h"
 
@@ -227,7 +228,7 @@
 #include "third_party/WebKit/public/platform/WebFloatPoint.h"
 #endif
 
-#if defined(ENABLE_PEPPER_CDMS)
+#if BUILDFLAG(ENABLE_PEPPER_CDMS)
 #include "content/renderer/media/cdm/pepper_cdm_wrapper_impl.h"
 #include "content/renderer/media/cdm/render_cdm_factory.h"
 #endif
@@ -6299,11 +6300,11 @@ media::CdmFactory* RenderFrameImpl::GetCdmFactory() {
   }
 #endif  //  defined(ENABLE_MOJO_CDM)
 
-#if defined(ENABLE_PEPPER_CDMS)
+#if BUILDFLAG(ENABLE_PEPPER_CDMS)
   DCHECK(frame_);
   cdm_factory_.reset(
       new RenderCdmFactory(base::Bind(&PepperCdmWrapperImpl::Create, frame_)));
-#endif  // defined(ENABLE_PEPPER_CDMS)
+#endif  // BUILDFLAG(ENABLE_PEPPER_CDMS)
 
   return cdm_factory_.get();
 }