Re-land http://codereview.chromium.org/7831056/ and http://codereview.chromium.org/7833042/ .

net/url_request/url_request_http_job.cc

Index: net/url_request/url_request_http_job.cc
===================================================================
--- net/url_request/url_request_http_job.cc	(revision 100345)
+++ net/url_request/url_request_http_job.cc	(working copy)
@@ -543,14 +543,14 @@
 }
 
 void URLRequestHttpJob::OnCookiesLoaded(
-    std::string* cookie_line,
-    std::vector<net::CookieStore::CookieInfo>* cookie_infos) {
-  if (!cookie_line->empty()) {
+    const std::string& cookie_line,
+    const std::vector<net::CookieStore::CookieInfo>& cookie_infos) {
+  if (!cookie_line.empty()) {
     request_info_.extra_headers.SetHeader(
-        HttpRequestHeaders::kCookie, *cookie_line);
+        HttpRequestHeaders::kCookie, cookie_line);
   }
   if (URLRequest::AreMacCookiesEnabled())
-    AddAuthorizationHeader(*cookie_infos, &request_info_);
+    AddAuthorizationHeader(cookie_infos, &request_info_);
   DoStartTransaction();
 }