Fix ChromeFrame referrer test which was flaky due to incorrect http header pa...

chrome_frame/urlmon_url_request.cc

Index: chrome_frame/urlmon_url_request.cc
===================================================================
--- chrome_frame/urlmon_url_request.cc	(revision 42275)
+++ chrome_frame/urlmon_url_request.cc	(working copy)
@@ -497,9 +497,7 @@
   // NOTE(slightlyoff): We don't use net::HttpResponseHeaders here because
   //    of lingering ICU/base_noicu issues.
   if (enable_frame_busting_) {
-    std::string http_headers = net::HttpUtil::AssembleRawHeaders(
-        raw_headers.c_str(), raw_headers.length());
-    if (http_utils::HasFrameBustingHeader(http_headers)) {
+    if (http_utils::HasFrameBustingHeader(raw_headers)) {
       DLOG(ERROR) << "X-Frame-Options header other than ALLOWALL " <<
           "detected, navigation canceled";
       return E_FAIL;