Remove remaining mentions of gflags

test/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("../webrtc.gni")
 import("//build/config/ui.gni")
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
 if (rtc_use_memcheck) {
   import("//tools_webrtc/valgrind/valgrind-webrtc.gni")
 }
 
 group("test") {
   testonly = true
 
   deps = [
     ":field_trial",
     ":rtp_test_utils",
     ":test_common",
     ":test_renderer",
     ":test_support",
     ":video_test_common",
   ]
 
-  if (!build_with_chromium) {
+  if (rtc_include_tests) {
     deps += [
       ":test_main",
       ":test_support_unittests",
     ]
   }
 }
 
 rtc_source_set("video_test_common") {
   testonly = true
   sources = [
@@ skipping 127 matching lines @@
 
   if (is_ios && !build_with_chromium) {
     deps += [ "../sdk:common_objc" ]
   }
 
   if (rtc_use_memcheck) {
     data = valgrind_webrtc_dependencies
   }
 }
 
-if (!build_with_chromium) {
-  # This target used to depend on //third_party/gflags which Chromium does not
-  # provide. TODO(oprypin): remove the conditional.
+if (rtc_include_tests) {
   rtc_source_set("test_main") {
     testonly = true
     sources = [
       "test_main.cc",
     ]
 
     public_deps = [
       ":test_support",
     ]
     deps = [
@@ skipping 531 matching lines @@
     ]
     deps = [
       "../rtc_base:base_java",
       "//testing/android/native_test:native_test_java",
     ]
 
     # TODO(sakal): Fix build hooks crbug.com/webrtc/8148
     no_build_hooks = true
   }
 }