Pepper: Add a X-Requested-With header to URL requests done for Pepper plugins.

ppapi/tests/test_url_loader.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 "ppapi/tests/test_url_loader.h"
 
 #include <stdio.h>
 #include <string.h>
 #include <string>
 
@@ skipping 823 matching lines @@
 
   rv = OpenWithPrefetchBufferThreshold(1000, 1);
   if (rv != PP_ERROR_FAILED) {
     return ReportError("The lower buffer value was higher than the upper but "
                        "the URLLoader did not fail.", rv);
   }
 
   PASS();
 }
 
+// TODO(viettrungluu): This test properly belongs elsewhere. It tests that
+// Chrome properly tags URL requests made on behalf of Pepper plugins (with an
+// X-Requested-With header), but this isn't, strictly speaking, a PPAPI
+// behavior.
+std::string TestURLLoader::TestXRequestedWithHeader() {
+  pp::URLRequestInfo request(instance_);
+  request.SetURL("/echoheader?X-Requested-With");
+  // The name and version of the plugin is set from the command-line (see
+  // chrome/test/ppapi/ppapi_test.cc.
+  return LoadAndCompareBody(request, "PPAPI Tests 1.2.3");
+}
+
 // TODO(viettrungluu): Add tests for  Get{Upload,Download}Progress, Close
 // (including abort tests if applicable).