Replace remaining gflags usages with rtc_base/flags

webrtc/logging/BUILD.gn

 # Copyright (c) 2016 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("//third_party/protobuf/proto_library.gni")
@@ skipping 124 matching lines @@
       ]
       deps = [
         ":rtc_event_log_api",
         ":rtc_event_log_impl",
         ":rtc_event_log_parser",
         "../modules/rtp_rtcp:rtp_rtcp",
         "../rtc_base:rtc_base_approved",
         "../system_wrappers:field_trial_default",
         "../system_wrappers:metrics_default",
         "../test:rtp_test_utils",
-        "//third_party/gflags",
       ]
       if (!build_with_chromium && is_clang) {
         # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).
         suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
       }
     }
   }
   if (rtc_include_tests) {
     rtc_executable("rtc_event_log2text") {
       testonly = true
       sources = [
         "rtc_event_log/rtc_event_log2text.cc",
       ]
       deps = [
         ":rtc_event_log_api",
         ":rtc_event_log_impl",
         ":rtc_event_log_parser",
         "../rtc_base:rtc_base_approved",
 
         # TODO(kwiberg): Remove this dependency.
         "../api/audio_codecs:audio_codecs_api",
         "../modules/rtp_rtcp:rtp_rtcp",
-        "//third_party/gflags",
       ]
       if (!build_with_chromium && is_clang) {
         # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).
         suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
       }
     }
   }
   if (rtc_include_tests) {
     rtc_executable("rtc_event_log2stats") {
       testonly = true
       sources = [
         "rtc_event_log/rtc_event_log2stats.cc",
       ]
       deps = [
         ":rtc_event_log_api",
         ":rtc_event_log_impl",
         ":rtc_event_log_proto",
         "../rtc_base:rtc_base_approved",
-        "//third_party/gflags",
       ]
       if (!build_with_chromium && is_clang) {
         # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).
         suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
       }
     }
   }
 }