Add Content-Type header to net::ReportSender reports

chrome/browser/ssl/chrome_expect_ct_reporter_unittest.cc

 // 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.
 
 #include "chrome/browser/ssl/chrome_expect_ct_reporter.h"
 
 #include <string>
 
 #include "base/base64.h"
 #include "base/command_line.h"
@@ skipping 21 matching lines @@
 
 // A test ReportSender that exposes the latest report URI and
 // serialized report to be sent.
 class TestCertificateReportSender : public net::ReportSender {
  public:
   TestCertificateReportSender()
       : ReportSender(nullptr, net::ReportSender::DO_NOT_SEND_COOKIES) {}
   ~TestCertificateReportSender() override {}
 
   void Send(const GURL& report_uri,
-            const std::string& serialized_report) override {
+            base::StringPiece content_type,
+            base::StringPiece serialized_report) override {
     latest_report_uri_ = report_uri;
-    latest_serialized_report_ = serialized_report;
+    serialized_report.CopyToString(&latest_serialized_report_);
+    content_type.CopyToString(&latest_content_type_);
   }
 
   const GURL& latest_report_uri() { return latest_report_uri_; }
 
+  const std::string& latest_content_type() { return latest_content_type_; }
+
   const std::string& latest_serialized_report() {
     return latest_serialized_report_;
   }
 
  private:
   GURL latest_report_uri_;
+  std::string latest_content_type_;
   std::string latest_serialized_report_;
 };
 
 // Constructs a net::SignedCertificateTimestampAndStatus with the given
 // information and appends it to |sct_list|.
 void MakeTestSCTAndStatus(
     net::ct::SignedCertificateTimestamp::Origin origin,
     const std::string& log_id,
     const std::string& extensions,
     const std::string& signature_data,
@@ skipping 406 matching lines @@
                        net::ct::SCT_STATUS_OK,
                        &ssl_info.signed_certificate_timestamps);
 
   net::HostPortPair host_port("example.test", 443);
   GURL report_uri("http://example-report.test");
 
   // Check that the report is sent and contains the correct information.
   reporter.OnExpectCTFailed(host_port, report_uri, ssl_info);
   EXPECT_EQ(report_uri, sender->latest_report_uri());
   EXPECT_FALSE(sender->latest_serialized_report().empty());
+  EXPECT_EQ("application/json; charset=utf-8", sender->latest_content_type());
   ASSERT_NO_FATAL_FAILURE(CheckExpectCTReport(
       sender->latest_serialized_report(), host_port, ssl_info));
 
   histograms.ExpectTotalCount(kFailureHistogramName, 0);
   histograms.ExpectTotalCount(kSendHistogramName, 1);
   histograms.ExpectBucketCount(kSendHistogramName, true, 1);
 }