Add Content-Type header to net::ReportSender reports

net/http/transport_security_state.cc

 // Copyright (c) 2012 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.
 
 #include "net/http/transport_security_state.h"
 
 #include <algorithm>
 #include <memory>
 #include <utility>
 #include <vector>
@@ skipping 900 matching lines @@
 void TransportSecurityState::SetDelegate(
     TransportSecurityState::Delegate* delegate) {
   DCHECK(CalledOnValidThread());
   delegate_ = delegate;
 }
 
 void TransportSecurityState::SetReportSender(
     TransportSecurityState::ReportSenderInterface* report_sender) {
   DCHECK(CalledOnValidThread());
   report_sender_ = report_sender;
-  if (report_sender_)
+  if (report_sender_) {
     report_sender_->SetErrorCallback(base::Bind(RecordUMAForHPKPReportFailure));
+    // TransportSecurityState sends JSON reports (for HPKP and
+    // Expect-Staple violations).
+    report_sender_->SetContentTypeHeader("application/json");
+  }
 }
 
 void TransportSecurityState::SetExpectCTReporter(
     ExpectCTReporter* expect_ct_reporter) {
   DCHECK(CalledOnValidThread());
   expect_ct_reporter_ = expect_ct_reporter;
 }
 
 void TransportSecurityState::SetRequireCTDelegate(RequireCTDelegate* delegate) {
   DCHECK(CalledOnValidThread());
@@ skipping 722 matching lines @@
 TransportSecurityState::PKPStateIterator::PKPStateIterator(
     const TransportSecurityState& state)
     : iterator_(state.enabled_pkp_hosts_.begin()),
       end_(state.enabled_pkp_hosts_.end()) {
 }
 
 TransportSecurityState::PKPStateIterator::~PKPStateIterator() {
 }
 
 }  // namespace