GN: Do not use forward_dependent_configs_from variable.

sync/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("//testing/test.gni")
 
 component("sync") {
   public_deps = [
     ":sync_core",
@@ skipping 744 matching lines @@
     "test/fake_server/tombstone_entity.cc",
     "test/fake_server/tombstone_entity.h",
     "test/fake_server/unique_client_entity.cc",
     "test/fake_server/unique_client_entity.h",
   ]
 
   deps = [
     "//base",
     "//net",
     "//testing/gtest",
-    "//third_party/protobuf:protobuf_lite",
     "//sync",
     "//url",
   ]
 
-  forward_dependent_configs_from = [ "//third_party/protobuf:protobuf_lite" ]
+  public_deps = [
+    "//third_party/protobuf:protobuf_lite",
+  ]
 
   configs += [ "//build/config/compiler:wexit_time_destructors" ]
 }
 
 # GYP version: sync/sync_tests.gypi:test_support_sync_testserver
 static_library("test_support_sync_testserver") {
   testonly = true
   sources = [
     "test/local_sync_test_server.cc",
     "test/local_sync_test_server.h",
@@ skipping 66 matching lines @@
       ":fake_server_jni",
       ":sync_core",
       ":test_support_sync_fake_server",
       "//base",
       "//sync/protocol:protocol",
       "//testing/gtest",
       "//url:url",
     ]
   }
 }