Add metrics for certificate report uploads

chrome/browser/safe_browsing/certificate_reporting_service_test_utils.cc

Index: chrome/browser/safe_browsing/certificate_reporting_service_test_utils.cc
diff --git a/chrome/browser/safe_browsing/certificate_reporting_service_test_utils.cc b/chrome/browser/safe_browsing/certificate_reporting_service_test_utils.cc
index f3c9d4c81f42d958541279ff02823d3c0c1454ca..be457569892b5c15b870c1a14ac68dd2b461de8d 100644
--- a/chrome/browser/safe_browsing/certificate_reporting_service_test_utils.cc
+++ b/chrome/browser/safe_browsing/certificate_reporting_service_test_utils.cc
@@ -443,4 +443,42 @@ void CertificateReportingServiceTestHelper::ExpectNoRequests(
   }
 }
 
+EventHistogramTester::EventHistogramTester() {}
+
+EventHistogramTester::~EventHistogramTester() {
+  if (submitted_) {

[estark, 2017/05/05 16:21:13]

Do you need these conditionals? Seems like the bucket counts ought to be 0 if
any of the expected counts is set  to 0.

[meacer, 2017/05/05 19:24:19]

Unfortunately yes, base::HistogramTester complains if you look up nonexistent
buckets.

+    histogram_tester_.ExpectBucketCount(
+        CertificateReportingService::kReportEventHistogram,
+        CertificateReportingService::REPORT_SUBMITTED, submitted_);
+  }
+  if (failed_) {
+    histogram_tester_.ExpectBucketCount(
+        CertificateReportingService::kReportEventHistogram,
+        CertificateReportingService::REPORT_FAILED, failed_);
+  }
+  if (successful_) {
+    histogram_tester_.ExpectBucketCount(
+        CertificateReportingService::kReportEventHistogram,
+        CertificateReportingService::REPORT_SUCCESSFUL, successful_);
+  }
+  if (dropped_) {
+    histogram_tester_.ExpectBucketCount(
+        CertificateReportingService::kReportEventHistogram,
+        CertificateReportingService::REPORT_DROPPED_OR_IGNORED, dropped_);
+  }
+  histogram_tester_.ExpectTotalCount(
+      CertificateReportingService::kReportEventHistogram,
+      submitted_ + failed_ + successful_ + dropped_);
+}
+
+void EventHistogramTester::SetExpectedValues(int submitted,
+                                             int failed,
+                                             int successful,
+                                             int dropped) {
+  submitted_ = submitted;
+  failed_ = failed;
+  successful_ = successful;
+  dropped_ = dropped;
+}
+
 }  // namespace certificate_reporting_test_utils