Reporting: Log 'JSON too big' HeaderOutcome

Change-Id: I75ecc7e893dfababd7669554433e674d77d95c1a
Reviewed-on: https://chromium-review.googlesource.com/953502
Commit-Queue: Julia Tuttle <juliatuttle@chromium.org>
Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#543732}

net/reporting/reporting_header_parser.cc

@@ -26,8 +26,9 @@ enum class HeaderOutcome {
   DISCARDED_NO_REPORTING_SERVICE = 0,
   DISCARDED_INVALID_SSL_INFO = 1,
   DISCARDED_CERT_STATUS_ERROR = 2,
-  DISCARDED_INVALID_JSON = 3,
+  DISCARDED_JSON_INVALID = 3,
   PARSED = 4,
+  DISCARDED_JSON_TOO_BIG = 5,
 
   MAX
 };
@@ -239,8 +240,13 @@ void ReportingHeaderParser::RecordHeaderDiscardedForCertStatusError() {
 }
 
 // static
-void ReportingHeaderParser::RecordHeaderDiscardedForInvalidJson() {
-  RecordHeaderOutcome(HeaderOutcome::DISCARDED_INVALID_JSON);
+void ReportingHeaderParser::RecordHeaderDiscardedForJsonInvalid() {
+  RecordHeaderOutcome(HeaderOutcome::DISCARDED_JSON_INVALID);
+}
+
+// static
+void ReportingHeaderParser::RecordHeaderDiscardedForJsonTooBig() {
+  RecordHeaderOutcome(HeaderOutcome::DISCARDED_JSON_TOO_BIG);
 }
 
 // static

net/reporting/reporting_header_parser.h

@@ -25,7 +25,8 @@ class NET_EXPORT ReportingHeaderParser {
   static void RecordHeaderDiscardedForNoReportingService();
   static void RecordHeaderDiscardedForInvalidSSLInfo();
   static void RecordHeaderDiscardedForCertStatusError();
-  static void RecordHeaderDiscardedForInvalidJson();
+  static void RecordHeaderDiscardedForJsonInvalid();
+  static void RecordHeaderDiscardedForJsonTooBig();
 
   static void ParseHeader(ReportingContext* context,
                           const GURL& url,

net/reporting/reporting_service.cc

@@ -54,7 +54,7 @@ class ReportingServiceImpl : public ReportingService {
         base::BindRepeating(&ReportingServiceImpl::ProcessHeaderValue,
                             weak_factory_.GetWeakPtr(), url),
         base::BindRepeating(
-            &ReportingHeaderParser::RecordHeaderDiscardedForInvalidJson));
+            &ReportingHeaderParser::RecordHeaderDiscardedForJsonInvalid));
   }
 
   void RemoveBrowsingData(int data_type_mask,

tools/metrics/histograms/enums.xml

@@ -37979,8 +37979,9 @@ Called by update_net_trust_anchors.py.-->
   <int value="0" label="Discarded: no ReportingService"/>
   <int value="1" label="Discarded: invalid SSLInfo"/>
   <int value="2" label="Discarded: cert status error"/>
-  <int value="3" label="Discarded: invalid JSON"/>
+  <int value="3" label="Discarded: JSON invalid"/>
   <int value="4" label="Parsed"/>
+  <int value="5" label="Discarded: JSON too big"/>
 </enum>
 
 <enum name="ReportingReportOutcome">