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

ios/chrome/browser/metrics/ios_chrome_metrics_services_manager_client.mm

Index: ios/chrome/browser/metrics/ios_chrome_metrics_services_manager_client.mm
diff --git a/ios/chrome/browser/metrics/ios_chrome_metrics_services_manager_client.mm b/ios/chrome/browser/metrics/ios_chrome_metrics_services_manager_client.mm
index 1337ab2c92b998542a0eafcfcedb0d0a297e4399..c94fc370c59ada87f364efd648cb75c6f6179a61 100644
--- a/ios/chrome/browser/metrics/ios_chrome_metrics_services_manager_client.mm
+++ b/ios/chrome/browser/metrics/ios_chrome_metrics_services_manager_client.mm
@@ -7,6 +7,7 @@
 #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"
@@ -30,9 +31,23 @@ std::unique_ptr<metrics::ClientInfo> LoadMetricsClientInfo() {
 
 }  // 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);
 }
 
@@ -78,7 +93,7 @@ bool IOSChromeMetricsServicesManagerClient::IsSafeBrowsingEnabled(
 }
 
 bool IOSChromeMetricsServicesManagerClient::IsMetricsReportingEnabled() {
-  return IOSChromeMetricsServiceAccessor::IsMetricsAndCrashReportingEnabled();
+  return enabled_state_provider_->IsReportingEnabled();
 }
 
 bool IOSChromeMetricsServicesManagerClient::OnlyDoMetricsRecording() {
@@ -91,8 +106,7 @@ 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));
   }