Add a response_info() accessor to URLRequest to get a reference to the net::H...

net/url_request/url_request_unittest.cc

Index: net/url_request/url_request_unittest.cc
===================================================================
--- net/url_request/url_request_unittest.cc	(revision 27578)
+++ net/url_request/url_request_unittest.cc	(working copy)
@@ -885,6 +885,10 @@
   MessageLoop::current()->Run();
 
   const net::HttpResponseHeaders* headers = req.response_headers();
+
+  // Simple sanity check that response_info() accesses the same data.
+  EXPECT_EQ(headers, req.response_info().headers.get());
+
   std::string header;
   EXPECT_TRUE(headers->GetNormalizedHeader("cache-control", &header));
   EXPECT_EQ("private", header);