Reporting: Payload field should be body, not report

Per https://w3c.github.io/reporting/#try-delivery, the field in a
JavaScript report object that contains the body is called `body`, not
`report`.

Bug: 704259
Change-Id: Iba3186a0104c2192ced5e4233d55e042e05908f3
Reviewed-on: https://chromium-review.googlesource.com/1140193
Reviewed-by: Misha Efimov <[email protected]>
Commit-Queue: Douglas Creager <[email protected]>
Cr-Commit-Position: refs/heads/master@{#575894}

Author: dcreager

content-security-policy/support/checkReport.sub.js

@@ -73,8 +73,8 @@
 
           if(data["csp-report"] != undefined && data["csp-report"][reportField] != undefined) {
             assert_field_value(data["csp-report"][reportField], reportValue, reportField);
-          } else if (data[0] != undefined && data[0]["report"] != undefined && data[0]["report"][reportField] != undefined) {
-            assert_field_value(data[0]["report"][reportField], reportValue, reportField);
+          } else if (data[0] != undefined && data[0]["body"] != undefined && data[0]["body"][reportField] != undefined) {
+            assert_field_value(data[0]["body"][reportField], reportValue, reportField);
           } else {
             assert_equals("", reportField, "Expected report field could not be found in report");
           }