Make single_sample_metrics into its own target

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.
 
 import("//testing/test.gni")
 
 static_library("metrics") {
   sources = [
     "call_stack_profile_metrics_provider.cc",
     "call_stack_profile_metrics_provider.h",
@@ skipping 73 matching lines @@
     "stability_metrics_provider.cc",
     "stability_metrics_provider.h",
     "system_memory_stats_recorder.h",
     "system_memory_stats_recorder_linux.cc",
     "system_memory_stats_recorder_win.cc",
     "url_constants.cc",
     "url_constants.h",
   ]
 
   public_deps = [
-    ":single_sample_metrics",
     "//components/metrics/proto",
-    "//components/metrics/public/interfaces:single_sample_metrics_mojo_bindings",
   ]
 
   deps = [
     ":call_stack_profile_params",
     "//base",
     "//base:base_static",
     "//components/browser_watcher:stability_client",
     "//components/prefs",
     "//components/variations",
     "//third_party/zlib:compression_utils",
@@ skipping 136 matching lines @@
 
     public_deps = [
       ":profiler",
     ]
     deps = [
       "//base",
     ]
   }
 }
 
-source_set("single_sample_metrics") {
+static_library("single_sample_metrics") {
   sources = [
     "single_sample_metrics.cc",
     "single_sample_metrics.h",
     "single_sample_metrics_factory_impl.cc",
     "single_sample_metrics_factory_impl.h",
   ]
 
   deps = [
-    "//components/metrics/public/interfaces:single_sample_metrics_mojo_bindings",
     "//mojo/public/cpp/bindings",
     "//services/service_manager/public/cpp",
     "//services/service_manager/public/interfaces",
   ]
+
+  public_deps = [
+    "//components/metrics/public/interfaces:single_sample_metrics_mojo_bindings",
+  ]
 }
 
 source_set("call_stack_profile_params") {
   sources = [
     "call_stack_profile_params.cc",
     "call_stack_profile_params.h",
   ]
 }
 
 source_set("call_stacks") {
@@ skipping 81 matching lines @@
     "stability_metrics_provider_unittest.cc",
     "ui/screen_info_metrics_provider_unittest.cc",
   ]
 
   deps = [
     ":call_stack_profile_params",
     ":child_call_stacks",
     ":metrics",
     ":net",
     ":profiler",
+    ":single_sample_metrics",
     ":test_support",
     ":ui",
     "//base/test:test_support",
     "//components/metrics/public/cpp:call_stack_unit_tests",
     "//components/prefs:test_support",
     "//components/variations",
     "//mojo/public/cpp/bindings",
     "//net:test_support",
     "//services/service_manager/public/cpp",
     "//testing/gtest",
@@ skipping 24 matching lines @@
 # Convenience testing target
 test("metrics_unittests") {
   sources = [
     "//components/test/run_all_unittests.cc",
   ]
   deps = [
     ":unit_tests",
     "//components/test:test_support",
   ]
 }