Delete fileutils_mock.h.

webrtc/base/BUILD.gn

 # Copyright (c) 2014 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/crypto.gni")
 import("//build/config/ui.gni")
@@ skipping 479 matching lines @@
   if (build_with_chromium) {
     if (is_win) {
       sources += [ "../../webrtc_overrides/webrtc/base/win32socketinit.cc" ]
     }
     include_dirs = [ "../../boringssl/src/include" ]
     public_configs += [ ":rtc_base_chromium_config" ]
   } else {
     configs += [ ":rtc_base_warnings_config" ]
     sources += [
       "callback.h",
-      "fileutils_mock.h",
       "json.cc",
       "json.h",
       "logsinks.cc",
       "logsinks.h",
       "mathutils.h",
       "optionsfile.cc",
       "optionsfile.h",
       "rollingaccumulator.h",
       "scopedptrcollection.h",
       "sslroots.h",
@@ skipping 398 matching lines @@
 
 if (is_android) {
   android_library("base_java") {
     java_files = [
       "java/src/org/webrtc/Logging.java",
       "java/src/org/webrtc/Size.java",
       "java/src/org/webrtc/ThreadUtils.java",
     ]
   }
 }