Add UMA histograms for policy loading.

chrome/browser/policy/policy_load_status.cc

+// Copyright (c) 2013 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/policy/policy_load_status.h"
+
+#include "base/metrics/histogram.h"
+#include "base/stringprintf.h"
+#include "chrome/browser/policy/policy_types.h"
+
+namespace policy {
+
+namespace {
+
+const char kHistogramName[] = "Enterprise.PolicyLoadStatus";
+
+}  // namespace
+
+PolicyLoadStatusSample::PolicyLoadStatusSample()
+  : histogram_(base::LinearHistogram::FactoryGet(

[Joao da Silva, 2013/04/17 10:48:47]

nit: indent

[Mattias Nissler (ping if slow), 2013/04/17 13:41:36]

Done.

+        kHistogramName, 0, POLICY_LOAD_STATUS_SIZE, POLICY_LOAD_STATUS_SIZE + 1,
+        base::Histogram::kUmaTargetedHistogramFlag)) {
+  Add(POLICY_LOAD_STATUS_STARTED);
+}
+
+PolicyLoadStatusSample::~PolicyLoadStatusSample() {
+  for (int i = 0; i < POLICY_LOAD_STATUS_SIZE; ++i) {
+    if (status_bits_[i])
+      histogram_->Add(i);
+  }
+}
+
+void PolicyLoadStatusSample::Add(PolicyLoadStatus status) {
+  status_bits_[status] = true;
+}
+
+}  // namespace policy