Reporting: Add histograms.

net/url_request/url_request_http_job.cc

Index: net/url_request/url_request_http_job.cc
diff --git a/net/url_request/url_request_http_job.cc b/net/url_request/url_request_http_job.cc
index fa2833368cf19bd86a92c0a52e1550919c0cafd7..32dd01f57b14832477bba1bb4978a98b8b12e6cf 100644
--- a/net/url_request/url_request_http_job.cc
+++ b/net/url_request/url_request_http_job.cc
@@ -75,6 +75,7 @@
 #endif
 
 #if BUILDFLAG(ENABLE_REPORTING)
+#include "net/reporting/reporting_header_parser.h"
 #include "net/reporting/reporting_service.h"
 #endif  // BUILDFLAG(ENABLE_REPORTING)
 
@@ -858,21 +859,29 @@ void URLRequestHttpJob::ProcessReportToHeader() {
   DCHECK(response_info_);
 
 #if BUILDFLAG(ENABLE_REPORTING)
+  HttpResponseHeaders* headers = GetResponseHeaders();
+  std::string value;
+  if (!headers->GetNormalizedHeader("Report-To", &value))
+    return;
+
   ReportingService* service = request_->context()->reporting_service();
-  if (!service)
+  if (!service) {
+    ReportingHeaderParser::RecordHeaderDiscardedForNoReportingService();
     return;
+  }
 
   // Only accept Report-To headers on HTTPS connections that have no
   // certificate errors.
   // TODO(juliatuttle): Do we need to check cert status?
   const SSLInfo& ssl_info = response_info_->ssl_info;
-  if (!ssl_info.is_valid() || IsCertStatusError(ssl_info.cert_status))
+  if (!ssl_info.is_valid()) {
+    ReportingHeaderParser::RecordHeaderDiscardedForInvalidSSLInfo();
     return;
-
-  HttpResponseHeaders* headers = GetResponseHeaders();
-  std::string value;
-  if (!headers->GetNormalizedHeader("Report-To", &value))
+  }
+  if (IsCertStatusError(ssl_info.cert_status)) {
+    ReportingHeaderParser::RecordHeaderDiscardedForCertStatusError();
     return;
+  }
 
   service->ProcessHeader(request_info_.url.GetOrigin(), value);
 #endif  // BUILDFLAG(ENABLE_REPORTING)