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

ios/chrome/browser/metrics/ios_chrome_metrics_services_manager_client.mm

 // 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 "ios/chrome/browser/metrics/ios_chrome_metrics_services_manager_client.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
+#include "components/metrics/enabled_state_provider.h"
 #include "components/metrics/metrics_state_manager.h"
 #include "components/prefs/pref_service.h"
 #include "components/rappor/rappor_service.h"
 #include "components/variations/service/variations_service.h"
 #include "ios/chrome/browser/application_context.h"
 #include "ios/chrome/browser/chrome_switches.h"
 #include "ios/chrome/browser/metrics/ios_chrome_metrics_service_accessor.h"
 #include "ios/chrome/browser/metrics/ios_chrome_metrics_service_client.h"
 #include "ios/chrome/browser/ui/browser_otr_state.h"
 #include "ios/chrome/browser/variations/ios_chrome_variations_service_client.h"
 #include "ios/chrome/browser/variations/ios_ui_string_overrider_factory.h"
 #include "ios/public/provider/chrome/browser/chrome_browser_provider.h"
 
 namespace {
 
 void PostStoreMetricsClientInfo(const metrics::ClientInfo& client_info) {}
 
 std::unique_ptr<metrics::ClientInfo> LoadMetricsClientInfo() {
   return std::unique_ptr<metrics::ClientInfo>();
 }
 
 }  // namespace
 
+class IOSChromeMetricsServicesManagerClient::IOSChromeEnabledStateProvider
+    : public metrics::EnabledStateProvider {
+ public:
+  IOSChromeEnabledStateProvider() {}
+  ~IOSChromeEnabledStateProvider() override {}
+
+  bool IsConsentGiven() override {
+    return IOSChromeMetricsServiceAccessor::IsMetricsAndCrashReportingEnabled();
+  }
+
+  DISALLOW_COPY_AND_ASSIGN(IOSChromeEnabledStateProvider);
+};
+
 IOSChromeMetricsServicesManagerClient::IOSChromeMetricsServicesManagerClient(
     PrefService* local_state)
-    : local_state_(local_state) {
+    : enabled_state_provider_(new IOSChromeEnabledStateProvider()),
+      local_state_(local_state) {
   DCHECK(local_state);
 }
 
 IOSChromeMetricsServicesManagerClient::
     ~IOSChromeMetricsServicesManagerClient() = default;
 
 std::unique_ptr<rappor::RapporService>
 IOSChromeMetricsServicesManagerClient::CreateRapporService() {
   DCHECK(thread_checker_.CalledOnValidThread());
   return base::WrapUnique(new rappor::RapporService(
@@ skipping 25 matching lines @@
   return GetApplicationContext()->GetSystemURLRequestContext();
 }
 
 bool IOSChromeMetricsServicesManagerClient::IsSafeBrowsingEnabled(
     const base::Closure& on_update_callback) {
   return ios::GetChromeBrowserProvider()->IsSafeBrowsingEnabled(
       on_update_callback);
 }
 
 bool IOSChromeMetricsServicesManagerClient::IsMetricsReportingEnabled() {
-  return IOSChromeMetricsServiceAccessor::IsMetricsAndCrashReportingEnabled();
+  return enabled_state_provider_->IsReportingEnabled();
 }
 
 bool IOSChromeMetricsServicesManagerClient::OnlyDoMetricsRecording() {
   const base::CommandLine* cmdline = base::CommandLine::ForCurrentProcess();
   return cmdline->HasSwitch(switches::kIOSMetricsRecordingOnly);
 }
 
 metrics::MetricsStateManager*
 IOSChromeMetricsServicesManagerClient::GetMetricsStateManager() {
   DCHECK(thread_checker_.CalledOnValidThread());
   if (!metrics_state_manager_) {
     metrics_state_manager_ = metrics::MetricsStateManager::Create(
-        local_state_, base::Bind(&IOSChromeMetricsServiceAccessor::
-                                     IsMetricsAndCrashReportingEnabled),
+        local_state_, enabled_state_provider_.get(),
         base::Bind(&PostStoreMetricsClientInfo),
         base::Bind(&LoadMetricsClientInfo));
   }
   return metrics_state_manager_.get();
 }