AU: Manual proxy support

proxy_resolver.cc

Index: proxy_resolver.cc
diff --git a/proxy_resolver.cc b/proxy_resolver.cc
index 6b3bd933ce2e00926b4995097accaaccdf5ccf1d..4ec8d1e73b9c58ef99cabebbd9ef5a5263f8ddcd 100644
--- a/proxy_resolver.cc
+++ b/proxy_resolver.cc
@@ -4,15 +4,15 @@
 
 #include "update_engine/proxy_resolver.h"
 
+using std::deque;
 using std::string;
-using std::vector;
 
 namespace chromeos_update_engine {
 
 const char kNoProxy[] = "direct://";
 
 bool DirectProxyResolver::GetProxiesForUrl(const string& url,
-                                           vector<string>* out_proxies) {
+                                           deque<string>* out_proxies) {
   out_proxies->clear();
   out_proxies->push_back(kNoProxy);
   return true;