Refactor UKM interface for mojo-ification

chrome/browser/android/metrics/uma_session_stats.cc

 // Copyright 2015 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/android/metrics/uma_session_stats.h"
 
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
 #include "base/command_line.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 35 matching lines @@
                                        const JavaParamRef<jobject>& obj) {
   DCHECK(g_browser_process);
 
   if (active_session_count_ == 0) {
     session_start_time_ = base::TimeTicks::Now();
 
     // Tell the metrics services that the application resumes.
     metrics::MetricsService* metrics = g_browser_process->metrics_service();
     if (metrics)
       metrics->OnAppEnterForeground();
-    ukm::UkmService* ukm_service = g_browser_process->ukm_service();
+    ukm::UkmService* ukm_service =
+        g_browser_process->GetMetricsServicesManager()->GetUkmService();
     if (ukm_service)
       ukm_service->OnAppEnterForeground();
   }
   ++active_session_count_;
 }
 
 void UmaSessionStats::UmaEndSession(JNIEnv* env,
                                     const JavaParamRef<jobject>& obj) {
   --active_session_count_;
   DCHECK_GE(active_session_count_, 0);
 
   if (active_session_count_ == 0) {
     base::TimeDelta duration = base::TimeTicks::Now() - session_start_time_;
 
     // Note: This metric is recorded separately on desktop in
     // DesktopSessionDurationTracker::EndSession.
     UMA_HISTOGRAM_LONG_TIMES("Session.TotalDuration", duration);
 
     DCHECK(g_browser_process);
     // Tell the metrics services they were cleanly shutdown.
     metrics::MetricsService* metrics = g_browser_process->metrics_service();
     if (metrics)
       metrics->OnAppEnterBackground();
-    ukm::UkmService* ukm_service = g_browser_process->ukm_service();
+    ukm::UkmService* ukm_service =
+        g_browser_process->GetMetricsServicesManager()->GetUkmService();
     if (ukm_service)
       ukm_service->OnAppEnterBackground();
   }
 }
 
 // static
 void UmaSessionStats::RegisterSyntheticFieldTrial(
     const std::string& trial_name,
     const std::string& group_name) {
   ChromeMetricsServiceAccessor::RegisterSyntheticFieldTrial(trial_name,
@@ skipping 146 matching lines @@
   // We should have only one UmaSessionStats instance.
   DCHECK(!g_uma_session_stats);
   g_uma_session_stats = new UmaSessionStats();
   return reinterpret_cast<intptr_t>(g_uma_session_stats);
 }
 
 // Register native methods
 bool RegisterUmaSessionStats(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }