Fix fuzzer breakage in Chromium.

webrtc/test/fuzzers/BUILD.gn

 # Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 import("//build/config/features.gni")
 import("//testing/test.gni")
 
 static_library("webrtc_fuzzer_main") {
   sources = [
     "webrtc_fuzzer_main.cc",
   ]
   deps = [
-    "..:field_trial",
+    "../../system_wrappers:field_trial_default",
     "//testing/libfuzzer:libfuzzer_main",
   ]
 }
 
 test("vp9_depacketizer_fuzzer") {
   sources = [
     "vp9_depacketizer_fuzzer.cc",
   ]
   deps = [
     ":webrtc_fuzzer_main",
     "../../modules/rtp_rtcp",
   ]
   if (is_clang) {
     # Suppress warnings from Chrome's Clang plugins.
     # See http://code.google.com/p/webrtc/issues/detail?id=163 for details.
     configs -= [ "//build/config/clang:find_bad_constructs" ]
   }
 }