Move ENABLE_PEPPER_CDMS to a buildflag header.

content/public/renderer/BUILD.gn

 # 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.
 
 import("//build/config/features.gni")
 
 # See //content/BUILD.gn for how this works.
 group("renderer") {
   if (is_component_build) {
     public_deps = [
@@ skipping 60 matching lines @@
     "//content/public/common:common_sources",
     "//content/renderer",
     "//gin",
     "//media",
     "//media/gpu/ipc/client",
     "//net",
     "//ppapi/c",
     "//skia",
     "//third_party/WebKit/public:blink_headers",
     "//third_party/libjingle",
-    "//third_party/widevine/cdm:version_h",
+    "//third_party/widevine/cdm:headers",
     "//ui/base",
     "//ui/base/ime",
     "//ui/gfx",
     "//v8",
   ]
 
   allow_circular_includes_from = [
     # This target is a pair with content/renderer. They always go together and
     # include headers from each other.
     "//content/renderer",
@@ skipping 17 matching lines @@
       "//content/public/common:feature_h264_with_openh264_ffmpeg",
       "//content/public/common:features",
       "//third_party/webrtc",
     ]
   }
 
   if (enable_plugins) {
     sources += [ "plugin_instance_throttler.h" ]
   }
 }