Backport r17761 from the trunk to the 172 branch....

net/http/http_network_transaction_unittest.cc

Index: net/http/http_network_transaction_unittest.cc
===================================================================
--- net/http/http_network_transaction_unittest.cc	(revision 18186)
+++ net/http/http_network_transaction_unittest.cc	(working copy)
@@ -1256,12 +1256,14 @@
   // Since we have proxy, should try to establish tunnel.
   MockWrite data_writes1[] = {
     MockWrite("CONNECT www.google.com:443 HTTP/1.1\r\n"
-              "Host: www.google.com\r\n\r\n"),
+              "Host: www.google.com\r\n"
+              "Proxy-Connection: keep-alive\r\n\r\n"),
 
     // After calling trans->RestartWithAuth(), this is the request we should
     // be issuing -- the final header line contains the credentials.
     MockWrite("CONNECT www.google.com:443 HTTP/1.1\r\n"
               "Host: www.google.com\r\n"
+              "Proxy-Connection: keep-alive\r\n"
               "Proxy-Authorization: Basic Zm9vOmJheg==\r\n\r\n"),
   };
 
@@ -1359,7 +1361,8 @@
   // Since we have proxy, should try to establish tunnel.
   MockWrite data_writes[] = {
     MockWrite("CONNECT www.google.com:443 HTTP/1.1\r\n"
-              "Host: www.google.com\r\n\r\n"),
+              "Host: www.google.com\r\n"
+              "Proxy-Connection: keep-alive\r\n\r\n"),
   };
 
   // The proxy responds to the connect with a 407.
@@ -1417,7 +1420,8 @@
   // Since we have proxy, should try to establish tunnel.
   MockWrite data_writes[] = {
     MockWrite("CONNECT www.google.com:443 HTTP/1.1\r\n"
-              "Host: www.google.com\r\n\r\n"),
+              "Host: www.google.com\r\n"
+              "Proxy-Connection: keep-alive\r\n\r\n"),
   };
 
   MockRead data_reads[] = {
@@ -2159,7 +2163,8 @@
   // Since we have proxy, should try to establish tunnel.
   MockWrite data_writes1[] = {
     MockWrite("CONNECT www.google.com:443 HTTP/1.1\r\n"
-              "Host: www.google.com\r\n\r\n"),
+              "Host: www.google.com\r\n"
+              "Proxy-Connection: keep-alive\r\n\r\n"),
   };
 
   // The proxy responds to the connect with a 404, using a persistent
@@ -2983,7 +2988,8 @@
 
   MockWrite proxy_writes[] = {
     MockWrite("CONNECT www.google.com:443 HTTP/1.1\r\n"
-              "Host: www.google.com\r\n\r\n"),
+              "Host: www.google.com\r\n"
+              "Proxy-Connection: keep-alive\r\n\r\n"),
   };
 
   MockRead proxy_reads[] = {
@@ -2993,7 +2999,8 @@
 
   MockWrite data_writes[] = {
     MockWrite("CONNECT www.google.com:443 HTTP/1.1\r\n"
-              "Host: www.google.com\r\n\r\n"),
+              "Host: www.google.com\r\n"
+              "Proxy-Connection: keep-alive\r\n\r\n"),
     MockWrite("GET / HTTP/1.1\r\n"
               "Host: www.google.com\r\n"
               "Connection: keep-alive\r\n\r\n"),