Pepper: Add a property to URLRequestInfo to skip header validation.

ppapi/cpp/url_request_info.h

 // Copyright (c) 2010 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 PPAPI_CPP_URL_REQUEST_INFO_H_
 #define PPAPI_CPP_URL_REQUEST_INFO_H_
 
 #include "ppapi/c/ppb_url_request_info.h"
 #include "ppapi/cpp/resource.h"
 #include "ppapi/cpp/var.h"
@@ skipping 33 matching lines @@
   }
   bool SetStreamToFile(bool enable) {
     return SetProperty(PP_URLREQUESTPROPERTY_STREAMTOFILE, enable);
   }
   bool SetFollowRedirects(bool enable) {
     return SetProperty(PP_URLREQUESTPROPERTY_FOLLOWREDIRECTS, enable);
   }
   bool SetRecordUploadProgress(bool enable) {
     return SetProperty(PP_URLREQUESTPROPERTY_RECORDUPLOADPROGRESS, enable);
   }
+  // To use the default referrer, set url_string to an Undefined Var.
+  bool SetCustomReferrerURL(const Var& url_string) {
+    return SetProperty(PP_URLREQUESTPROPERTY_CUSTOMREFERRERURL, url_string);
+  }
 };
 
 }  // namespace pp
 
 #endif  // PPAPI_CPP_URL_REQUEST_INFO_H_