Record document mode histogram in UMA on every upload.

chrome/browser/metrics/chrome_metrics_service_client.cc

Index: chrome/browser/metrics/chrome_metrics_service_client.cc
diff --git a/chrome/browser/metrics/chrome_metrics_service_client.cc b/chrome/browser/metrics/chrome_metrics_service_client.cc
index ab229004930c47e2b99efbd2bd2d79135f62413b..c3f2acf23ece19d74e90e57057694f4d48100bee 100644
--- a/chrome/browser/metrics/chrome_metrics_service_client.cc
+++ b/chrome/browser/metrics/chrome_metrics_service_client.cc
@@ -240,11 +240,6 @@ void ChromeMetricsServiceClient::CollectFinalMetrics(
   DCHECK(!waiting_for_collect_final_metrics_step_);
   waiting_for_collect_final_metrics_step_ = true;
 
-#if !defined(OS_CHROMEOS) && !defined(OS_IOS)
-  // Record the signin status histogram value.
-  signin_status_metrics_provider_->RecordSigninStatusHistogram();
-#endif
-
   base::Closure callback =
       base::Bind(&ChromeMetricsServiceClient::OnMemoryDetailCollectionDone,
                  weak_ptr_factory_.GetWeakPtr());
@@ -340,10 +335,9 @@ void ChromeMetricsServiceClient::Initialize() {
 #endif  // defined(OS_CHROMEOS)
 
 #if !defined(OS_CHROMEOS) && !defined(OS_IOS)
-  signin_status_metrics_provider_ =
-      SigninStatusMetricsProvider::CreateInstance();
   metrics_service_->RegisterMetricsProvider(
-      scoped_ptr<metrics::MetricsProvider>(signin_status_metrics_provider_));
+      scoped_ptr<metrics::MetricsProvider>(
+          SigninStatusMetricsProvider::CreateInstance()));
 #endif
 }