Add Content-Type header to net::ReportSender reports

net/url_request/report_sender.h

 // Copyright 2015 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.
 
 #ifndef NET_URL_REQUEST_REPORT_SENDER_H_
 #define NET_URL_REQUEST_REPORT_SENDER_H_
 
 #include <memory>
 #include <set>
 #include <string>
@@ skipping 36 matching lines @@
   // ReportSender. When sending a report results in an error,
   // |error_callback| is called with the report URI and net error as
   // arguments.
   ReportSender(URLRequestContext* request_context,
                CookiesPreference cookies_preference,
                const ErrorCallback& error_callback);
 
   ~ReportSender() override;
 
   // TransportSecurityState::ReportSenderInterface implementation.
-  void Send(const GURL& report_uri, const std::string& report) override;
+  void Send(const GURL& report_uri,
+            base::StringPiece content_type,
+            base::StringPiece report) override;
   void SetErrorCallback(const ErrorCallback& error_callback) override;
 
   // net::URLRequest::Delegate implementation.
   void OnResponseStarted(URLRequest* request) override;
   void OnReadCompleted(URLRequest* request, int bytes_read) override;
 
  private:
   net::URLRequestContext* const request_context_;
 
   CookiesPreference cookies_preference_;
 
   // Owns the contained requests.
   std::set<URLRequest*> inflight_requests_;
 
   // Called when a sent report results in an error.
   ErrorCallback error_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(ReportSender);
 };
 
 }  // namespace net
 
 #endif  // NET_URL_REQUEST_REPORT_SENDER_H_