Add metrics for certificate report uploads

chrome/browser/safe_browsing/certificate_reporting_service_test_utils.h

 // Copyright 2016 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.
 
 #ifndef CHROME_BROWSER_SAFE_BROWSING_CERTIFICATE_REPORTING_SERVICE_TEST_UTILS_H_
 #define CHROME_BROWSER_SAFE_BROWSING_CERTIFICATE_REPORTING_SERVICE_TEST_UTILS_H_
 
 #include <unordered_map>
 
 #include "base/macros.h"
 #include "base/run_loop.h"
+#include "base/test/histogram_tester.h"
 #include "base/threading/non_thread_safe.h"
 #include "chrome/browser/safe_browsing/certificate_reporting_service.h"
 #include "content/public/test/test_browser_thread.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "net/base/network_delegate_impl.h"
 #include "net/url_request/url_request_interceptor.h"
 #include "net/url_request/url_request_job.h"
 
 namespace net {
 class NetworkDelegate;
@@ skipping 211 matching lines @@
   void SetUpInterceptorOnIOThread();
 
   CertReportJobInterceptor* url_request_interceptor_;
 
   uint8_t server_public_key_[32];
   uint8_t server_private_key_[32];
 
   DISALLOW_COPY_AND_ASSIGN(CertificateReportingServiceTestHelper);
 };
 
+// Class to test reporting events histogram for CertificateReportingService.
+// We can't use a simple HistogramTester, as we need to wait until test teardown
+// to check the histogram contents. This ensures that all in-flight requests
+// are torn down by the time we check the histograms.
+class EventHistogramTester {
+ public:
+  EventHistogramTester();
+  ~EventHistogramTester();
+
+  void SetExpectedValues(int submitted,
+                         int failed,
+                         int successful,
+                         int dropped);
+
+ private:
+  int submitted_;

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

initialize all to 0

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

Done.

+  int failed_;
+  int successful_;
+  int dropped_;
+  base::HistogramTester histogram_tester_;
+};
+
 }  // namespace certificate_reporting_test_utils
 
 #endif  // CHROME_BROWSER_SAFE_BROWSING_CERTIFICATE_REPORTING_SERVICE_TEST_UTILS_H_