Splitting the concept of UMA consent, and should UMA report.

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
 }
 
 # GYP version: components/metrics.gypi:metrics
@@ skipping 11 matching lines @@
     "daily_event.h",
     "data_use_tracker.cc",
     "data_use_tracker.h",
     "drive_metrics_provider.cc",
     "drive_metrics_provider.h",
     "drive_metrics_provider_android.cc",
     "drive_metrics_provider_ios.mm",
     "drive_metrics_provider_linux.cc",
     "drive_metrics_provider_mac.mm",
     "drive_metrics_provider_win.cc",
+    "enabled_state_provider.cc",
+    "enabled_state_provider.h",
     "file_metrics_provider.cc",
     "file_metrics_provider.h",
     "histogram_encoder.cc",
     "histogram_encoder.h",
     "machine_id_provider.h",
     "machine_id_provider_stub.cc",
     "machine_id_provider_win.cc",
     "metrics_log.cc",
     "metrics_log.h",
     "metrics_log_manager.cc",
@@ skipping 212 matching lines @@
     deps = [
       "//base",
     ]
   }
 }
 
 # GYP version: components/metrics.gypi:metrics_test_support
 source_set("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 = [
@@ skipping 88 matching lines @@
 
   # 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",
       "ENABLE_REPORTING_BLIMP",
     ]
   }
 }