Add widevine and extensions resources to GN build.

content/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("//tools/grit/grit_rule.gni")
 
 # Applied by targets internal to content.
 config("content_implementation") {
   defines = [ "CONTENT_IMPLEMENTATION" ]
 }
@@ skipping 76 matching lines @@
   }
 
   if (is_posix) {
     defines += [ "POSIX" ]
   }
   if (is_chromeos) {
     defines += [ "CHROMEOS" ]
   }
 }
 
-config("widevine_stub_config") {
-  # The real implementation does a copy rule to copy the header to the gen dir.
-  include_dirs = [ "//third_party/widevine/cdm" ]
-}
-
 # Sets up include dirs while webrtc is being converted to GN.
 # TODO(GYP) remove when webrtc is ready.
 config("webrtc_stub_config") {
   defines = [ "WEBRTC_CHROMIUM_BUILD" ]
   include_dirs = [
     "//third_party/webrtc/overrides",  # Must be first.
     "//third_party",
   ]
 
   if (is_mac) {
     defines += [ "WEBRTC_MAC" ]
   } else if (is_win) {
     defines += [ "WEBRTC_WIN" ]
   } else if (is_linux) {
     defines += [ "WEBRTC_LINUX" ]
   } else if (is_ios) {
     defines += [ "WEBRTC_MAC", "WEBRTC_IOS" ]
   } else if (is_android) {
     defines += [ "WEBRTC_LINUX", "WEBRTC_ANDROID" ]
     import("//build/config/crypto.gni")
     if (use_openssl) {
       defines += [ "WEBRTC_ANDROID_OPENSLEQS" ]
     }
   }
 
   if (is_posix) {
     defines += [ "WEBRTC_POSIX" ]
   }
 }