Convert test_support source sets to static libs

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.
 
 declare_args() {
   # Overrides os name in uma metrics log to "Blimp".
   metrics_use_blimp = false
 }
 
 # These are only used by the blimp team, which has entirely migrated to gn,
 # so this logic is not replicated in the gyp file.
 if (metrics_use_blimp) {
   defines = [ "OVERRIDE_OS_NAME_TO_BLIMP" ]
 }
 
 # GYP version: components/metrics.gypi:metrics
-source_set("metrics") {
+static_library("metrics") {
   sources = [
     "call_stack_profile_metrics_provider.cc",
     "call_stack_profile_metrics_provider.h",
     "clean_exit_beacon.cc",
     "clean_exit_beacon.h",
     "client_info.cc",
     "client_info.h",
     "cloned_install_detector.cc",
     "cloned_install_detector.h",
     "daily_event.cc",
@@ skipping 95 matching lines @@
     deps = [
       "//base",
       "//content/public/browser",
       "//gpu/config",
     ]
   }
 }
 
 if (is_chromeos) {
   # GYP version: components/metrics.gypi:metrics_leak_detector
-  source_set("leak_detector") {
+  static_library("leak_detector") {
     sources = [
       "leak_detector/call_stack_manager.cc",
       "leak_detector/call_stack_manager.h",
       "leak_detector/call_stack_table.cc",
       "leak_detector/call_stack_table.h",
       "leak_detector/custom_allocator.cc",
       "leak_detector/custom_allocator.h",
       "leak_detector/leak_analyzer.cc",
       "leak_detector/leak_analyzer.h",
       "leak_detector/leak_detector.cc",
@@ skipping 45 matching lines @@
   if (is_chromeos) {
     sources += [
       "net/wifi_access_point_info_provider_chromeos.cc",
       "net/wifi_access_point_info_provider_chromeos.h",
     ]
     deps += [ "//chromeos" ]
   }
 }
 
 # GYP version: components/metrics.gypi:metrics_profiler
-source_set("profiler") {
+static_library("profiler") {
   sources = [
     "profiler/profiler_metrics_provider.cc",
     "profiler/profiler_metrics_provider.h",
     "profiler/tracking_synchronizer.cc",
     "profiler/tracking_synchronizer.h",
     "profiler/tracking_synchronizer_delegate.h",
     "profiler/tracking_synchronizer_observer.cc",
     "profiler/tracking_synchronizer_observer.h",
   ]
 
@@ skipping 19 matching lines @@
   deps = [
     "//base",
     "//ui/display",
     "//ui/gfx",
     "//ui/gfx/geometry",
   ]
 }
 
 if (!is_ios) {
   # GYP version: components/metrics.gypi:metrics_profiler_content
-  source_set("profiler_content") {
+  static_library("profiler_content") {
     sources = [
       "profiler/content/content_tracking_synchronizer_delegate.cc",
       "profiler/content/content_tracking_synchronizer_delegate.h",
     ]
 
     public_deps = [
       ":profiler",
     ]
     deps = [
       "//base",
       "//components/nacl/common:process_type",
       "//content/public/browser",
       "//content/public/common",
     ]
   }
 } else {
   # GYP version: components/metrics.gypi:metrics_profiler_ios
-  source_set("profiler_ios") {
+  static_library("profiler_ios") {
     sources = [
       "profiler/ios/ios_tracking_synchronizer_delegate.cc",
       "profiler/ios/ios_tracking_synchronizer_delegate.h",
     ]
 
     public_deps = [
       ":profiler",
     ]
     deps = [
       "//base",
     ]
   }
 }
 
 # GYP version: components/metrics.gypi:metrics_test_support
-source_set("test_support") {
+static_library("test_support") {
   testonly = true
   sources = [
     "test_enabled_state_provider.cc",
     "test_enabled_state_provider.h",
     "test_metrics_provider.cc",
     "test_metrics_provider.h",
     "test_metrics_service_client.cc",
     "test_metrics_service_client.h",
   ]
 
   public_deps = [
     ":metrics",
   ]
   deps = [
     "//base",
   ]
 }
 
 if (is_linux) {
   # GYP version: components/metrics.gypi:metrics_serialization
-  source_set("serialization") {
+  static_library("serialization") {
     sources = [
       "serialization/metric_sample.cc",
       "serialization/metric_sample.h",
       "serialization/serialization_utils.cc",
       "serialization/serialization_utils.h",
     ]
     deps = [
       "//base",
     ]
   }
@@ skipping 62 matching lines @@
 
   if (is_linux) {
     sources += [ "serialization/serialization_utils_unittest.cc" ]
     deps += [ ":serialization" ]
   }
 
   if (is_chromeos) {
     deps += [ ":leak_detector_unit_tests" ]
   }
 }