Revert of Moving proxy resolution logic out of NetworkDelegate and into ProxyDelegate

net/base/network_delegate_impl.cc

Index: net/base/network_delegate_impl.cc
diff --git a/net/base/network_delegate_impl.cc b/net/base/network_delegate_impl.cc
index 43f94af8f1645ce8168605957033893e6da0ef0a..5e94543b3031436c2905b93f96e42aebfe4802ff 100644
--- a/net/base/network_delegate_impl.cc
+++ b/net/base/network_delegate_impl.cc
@@ -12,6 +12,16 @@
                                             const CompletionCallback& callback,
                                             GURL* new_url) {
   return OK;
+}
+
+void NetworkDelegateImpl::OnResolveProxy(const GURL& url,
+                                         int load_flags,
+                                         const ProxyService& proxy_service,
+                                         ProxyInfo* result) {
+}
+
+void NetworkDelegateImpl::OnProxyFallback(const ProxyServer& bad_proxy,
+                                          int net_error) {
 }
 
 int NetworkDelegateImpl::OnBeforeSendHeaders(URLRequest* request,