Revert of Move ENABLE_PEPPER_CDMS to a buildflag header.

content/renderer/BUILD.gn

Index: content/renderer/BUILD.gn
diff --git a/content/renderer/BUILD.gn b/content/renderer/BUILD.gn
index f66759df44f9352276085b05d0488a1b1b7d4142..f8847d44536df241647b23940888e50d3cad5867 100644
--- a/content/renderer/BUILD.gn
+++ b/content/renderer/BUILD.gn
@@ -5,7 +5,6 @@
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//media/media_options.gni")
-import("//ppapi/features/features.gni")
 import("//third_party/webrtc/build/webrtc.gni")
 import("//tools/ipc_fuzzer/ipc_fuzzer.gni")
 
@@ -438,7 +437,6 @@
     "//mojo/public/cpp/bindings",
     "//mojo/public/js",
     "//net",
-    "//ppapi/features",
     "//sandbox",
     "//services/shell/public/cpp",
     "//services/shell/public/interfaces",
@@ -450,7 +448,7 @@
     "//third_party/icu",
     "//third_party/libjingle",
     "//third_party/libyuv",
-    "//third_party/widevine/cdm:headers",
+    "//third_party/widevine/cdm:version_h",
     "//ui/accessibility",
     "//ui/base",
     "//ui/base/ime",