Tracking mock_paced_sender.h with a GN target

webrtc/modules/bitrate_controller/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")
 
@@ skipping 43 matching lines @@
       visibility = [ "..:modules_unittests" ]
     }
     sources = [
       "bitrate_controller_unittest.cc",
       "send_side_bandwidth_estimation_unittest.cc",
     ]
     deps = [
       ":bitrate_controller",
       "../../test:field_trial",
       "../../test:test_support",
+      "../pacing:mock_paced_sender",
       "../remote_bitrate_estimator:remote_bitrate_estimator",
       "//testing/gmock",
     ]
     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" ]
     }
   }
 }