Add Content-Type header to net::ReportSender reports

net/url_request/url_request_unittest.cc

Index: net/url_request/url_request_unittest.cc
diff --git a/net/url_request/url_request_unittest.cc b/net/url_request/url_request_unittest.cc
index 328d53b81091a6faab351c398c38a2129ca8acc9..1e88c34747a988b5a12230e1c977b190ed93b16f 100644
--- a/net/url_request/url_request_unittest.cc
+++ b/net/url_request/url_request_unittest.cc
@@ -675,9 +675,12 @@ class MockCertificateReportSender
   MockCertificateReportSender() {}
   ~MockCertificateReportSender() override {}
 
-  void Send(const GURL& report_uri, const std::string& report) override {
+  void Send(const GURL& report_uri,
+            const std::string& content_type,
+            const std::string& report) override {
     latest_report_uri_ = report_uri;
     latest_report_ = report;
+    latest_content_type_ = content_type;
   }
 
   void SetErrorCallback(
@@ -685,10 +688,12 @@ class MockCertificateReportSender
 
   const GURL& latest_report_uri() { return latest_report_uri_; }
   const std::string& latest_report() { return latest_report_; }
+  const std::string& latest_content_type() { return latest_content_type_; }
 
  private:
   GURL latest_report_uri_;
   std::string latest_report_;
+  std::string latest_content_type_;
 };
 
 class TestExperimentalFeaturesNetworkDelegate : public TestNetworkDelegate {
@@ -6022,6 +6027,7 @@ TEST_F(URLRequestTestHTTP, ProcessPKPAndSendReport) {
   // Check that a report was sent.
   EXPECT_EQ(report_uri, mock_report_sender.latest_report_uri());
   ASSERT_FALSE(mock_report_sender.latest_report().empty());
+  EXPECT_EQ("application/json", mock_report_sender.latest_content_type());
   std::unique_ptr<base::Value> value(
       base::JSONReader::Read(mock_report_sender.latest_report()));
   ASSERT_TRUE(value);
@@ -6085,6 +6091,7 @@ TEST_F(URLRequestTestHTTP, ProcessPKPReportOnly) {
   // Check that a report was sent.
   EXPECT_EQ(report_uri, mock_report_sender.latest_report_uri());
   ASSERT_FALSE(mock_report_sender.latest_report().empty());
+  EXPECT_EQ("application/json", mock_report_sender.latest_content_type());
   std::unique_ptr<base::Value> value(
       base::JSONReader::Read(mock_report_sender.latest_report()));
   ASSERT_TRUE(value);