Move ENABLE_PEPPER_CDMS to a buildflag header.

content/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")
 import("//build/config/ui.gni")
 import("//media/media_options.gni")
 import("//third_party/webrtc/build/webrtc.gni")
+import("//third_party/widevine/cdm/widevine.gni")
 import("//tools/ipc_fuzzer/ipc_fuzzer.gni")
 
 if (is_component_build) {
   link_target_type = "source_set"
 } else {
   link_target_type = "static_library"
 }
 target(link_target_type, "renderer") {
   # Only the public target should depend on this. All other targets (even
   # internal content ones) should depend on the public one.
@@ skipping 422 matching lines @@
     "//services/shell/public/cpp",
     "//services/shell/public/interfaces",
     "//skia",
     "//storage/common",
     "//third_party/WebKit/public:blink",
     "//third_party/WebKit/public:mojo_bindings",
     "//third_party/boringssl",
     "//third_party/icu",
     "//third_party/libjingle",
     "//third_party/libyuv",
+    "//third_party/widevine/cdm:cdm_features",
     "//third_party/widevine/cdm:version_h",
     "//ui/accessibility",
     "//ui/base",
     "//ui/base/ime",
     "//ui/display",
     "//ui/events:dom_keycode_converter",
     "//ui/events:events_base",
     "//ui/events/blink",
     "//ui/gfx/geometry/mojo",
     "//ui/gl",
@@ skipping 439 matching lines @@
     # For the defines in mojo_media_config.
     public_configs = [ "//media/mojo/services:mojo_media_config" ]
   }
 
   if (!is_component_build) {
     public_deps = [
       ":renderer",
     ]
   }
 }