Cleanup of component/metrics for GN.

components/metrics/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # GYP version: components/metrics.gypi:metrics
 source_set("metrics") {
   sources = [
     "clean_exit_beacon.cc",
     "clean_exit_beacon.h",
     "client_info.cc",
@@ skipping 34 matching lines @@
   ]
 
   public_deps = [
     "//components/metrics/proto",
   ]
   deps = [
     "//base",
     "//components/variations",
     "//third_party/zlib",
   ]
+
+  if (is_chromeos) {
+    deps += [ ":serialization" ]
+  }
 }
 
 # GYP version: components/metrics.gypi:metrics_gpu
 source_set("gpu") {
   sources = [
     "gpu/gpu_metrics_provider.cc",
     "gpu/gpu_metrics_provider.h",
   ]
 
   public_deps = [
@@ skipping 49 matching lines @@
   sources = [
     "test_metrics_service_client.cc",
     "test_metrics_service_client.h",
   ]
 
   public_deps = [
     ":metrics",
   ]
 }
 
+if (is_linux) {
+  # GYP version: components/metrics.gypi:metrics_serialization
+  source_set("serialization") {
+    sources = [
+      "serialization/serialization_utils.cc",
+      "serialization/serialization_utils.h",
+      "serialization/metric_sample.cc",
+      "serialization/metric_sample.h",
+    ]
+    deps = [ "//base" ]
+  }
+}
+
 # TODO(GYP): metrics_chromeos