Refactor webrtc_perf_tests into several source_sets.

webrtc/modules/remote_bitrate_estimator/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/webrtc.gni")
 
@@ skipping 106 matching lines @@
       "../../test:test_support",
       "../../voice_engine",
       "../bitrate_controller",
       "../congestion_controller",
       "../pacing",
       "../rtp_rtcp",
       "//testing/gmock",
       "//testing/gtest",
     ]
   }
+
+  rtc_source_set("remote_bitrate_estimator_perf_tests") {
+    testonly = true
+    sources = [
+      "remote_bitrate_estimators_test.cc",
+    ]
+    deps = [
+      ":bwe_simulator_lib",
+    ]
+    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" ]
+    }
+  }
 }