Move data reduction proxy to Chrome-Proxy header for authentication

net/url_request/url_request_test_util.cc

Index: net/url_request/url_request_test_util.cc
diff --git a/net/url_request/url_request_test_util.cc b/net/url_request/url_request_test_util.cc
index e240082fd9d9e955a9dca45fe01c94f4a37f8ef1..01f5f47db96124aff6c85f4ea4e6d0f0ff9d9d10 100644
--- a/net/url_request/url_request_test_util.cc
+++ b/net/url_request/url_request_test_util.cc
@@ -324,6 +324,7 @@ TestNetworkDelegate::TestNetworkDelegate()
       blocked_get_cookies_count_(0),
       blocked_set_cookie_count_(0),
       set_cookie_count_(0),
+      observed_before_proxy_headers_sent_callbacks_(0),
       has_load_timing_info_before_redirect_(false),
       has_load_timing_info_before_auth_(false),
       can_access_files_(true),
@@ -396,6 +397,14 @@ int TestNetworkDelegate::OnBeforeSendHeaders(
   return OK;
 }
 
+void TestNetworkDelegate::OnBeforeSendProxyHeaders(
+    net::URLRequest* request,
+    const net::ProxyInfo* proxy_info,
+    net::HttpRequestHeaders* headers) {
+  ++observed_before_proxy_headers_sent_callbacks_;
+  last_observed_proxy_ = proxy_info->proxy_server().host_port_pair();
+}
+
 void TestNetworkDelegate::OnSendHeaders(
     URLRequest* request,
     const HttpRequestHeaders& headers) {