Basic UkmService implementation

chrome/browser/metrics/chrome_metrics_service_client.cc

 // 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.
 
 #include "chrome/browser/metrics/chrome_metrics_service_client.h"
 
 #include <stddef.h>
 
 #include <utility>
 #include <vector>
@@ skipping 52 matching lines @@
 #include "components/metrics/profiler/profiler_metrics_provider.h"
 #include "components/metrics/profiler/tracking_synchronizer.h"
 #include "components/metrics/stability_metrics_helper.h"
 #include "components/metrics/ui/screen_info_metrics_provider.h"
 #include "components/metrics/url_constants.h"
 #include "components/omnibox/browser/omnibox_metrics_provider.h"
 #include "components/prefs/pref_registry_simple.h"
 #include "components/prefs/pref_service.h"
 #include "components/sync/device_info/device_count_metrics_provider.h"
 #include "components/translate/core/browser/translate_ranker_metrics_provider.h"
+#include "components/ukm/ukm_service.h"
 #include "components/version_info/version_info.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/histogram_fetcher.h"
 #include "content/public/browser/notification_service.h"
 #include "extensions/features/features.h"
 #include "ppapi/features/features.h"
 #include "printing/features/features.h"
 
 #if defined(OS_ANDROID)
 #include "chrome/browser/metrics/android_metrics_provider.h"
@@ skipping 228 matching lines @@
   std::unique_ptr<ChromeMetricsServiceClient> client(
       new ChromeMetricsServiceClient(state_manager));
   client->Initialize();
 
   return client;
 }
 
 // static
 void ChromeMetricsServiceClient::RegisterPrefs(PrefRegistrySimple* registry) {
   metrics::MetricsService::RegisterPrefs(registry);
+  ukm::UkmService::RegisterPrefs(registry);
   metrics::StabilityMetricsHelper::RegisterPrefs(registry);
 
   RegisterFileMetricsPreferences(registry);
 
   metrics::RegisterMetricsReportingStatePrefs(registry);
 
 #if defined(OS_ANDROID)
   AndroidMetricsProvider::RegisterPrefs(registry);
 #endif  // defined(OS_ANDROID)
 
 #if BUILDFLAG(ENABLE_PLUGINS)
   PluginMetricsProvider::RegisterPrefs(registry);
 #endif  // BUILDFLAG(ENABLE_PLUGINS)
 }
 
 metrics::MetricsService* ChromeMetricsServiceClient::GetMetricsService() {
   return metrics_service_.get();
 }
 
+ukm::UkmService* ChromeMetricsServiceClient::GetUkmService() {
+  return ukm_service_.get();
+}
+
 void ChromeMetricsServiceClient::SetMetricsClientId(
     const std::string& client_id) {
   crash_keys::SetMetricsClientIdFromGUID(client_id);
 }
 
 int32_t ChromeMetricsServiceClient::GetProduct() {
   return metrics::ChromeUserMetricsExtension::CHROME;
 }
 
 std::string ChromeMetricsServiceClient::GetApplicationLocale() {
@@ skipping 203 matching lines @@
   // Clear deprecated metrics preference for Android.
   // TODO(gayane): Cleanup this code after M60 when the pref would be cleared
   // from clients.
 #if defined(OS_ANDROID)
   local_state->ClearPref(prefs::kCrashReportingEnabled);
 #endif
 
   metrics_service_.reset(
       new metrics::MetricsService(metrics_state_manager_, this, local_state));
 
+  if (base::FeatureList::IsEnabled(kUkmFeature))

[rkaplow, 2017/01/11 22:05:13]

should be ukm::kUkmFeature

[Steven Holte, 2017/01/11 22:52:03]

Done.

+    ukm_service_.reset(new ukm::UkmService(local_state, this));
+
   // Gets access to persistent metrics shared by sub-processes.
   metrics_service_->RegisterMetricsProvider(
       std::unique_ptr<metrics::MetricsProvider>(
           new SubprocessMetricsProvider()));
 
   // Register metrics providers.
 #if BUILDFLAG(ENABLE_EXTENSIONS)
   metrics_service_->RegisterMetricsProvider(
       std::unique_ptr<metrics::MetricsProvider>(
           new ExtensionsMetricsProvider(metrics_state_manager_)));
@@ skipping 321 matching lines @@
   }
 }
 
 void ChromeMetricsServiceClient::OnURLOpenedFromOmnibox(OmniboxLog* log) {
   metrics_service_->OnApplicationNotIdle();
 }
 
 bool ChromeMetricsServiceClient::IsUMACellularUploadLogicEnabled() {
   return metrics::IsCellularLogicEnabled();
 }