Add Finch experiment for selectively bypassing proxies.

net/socket_stream/socket_stream.cc

Index: net/socket_stream/socket_stream.cc
diff --git a/net/socket_stream/socket_stream.cc b/net/socket_stream/socket_stream.cc
index 7404ff34a4c4b658041026ef5db5b2758138e8ab..093b12af1e1df44ce8a270f78adeb774946f74e6 100644
--- a/net/socket_stream/socket_stream.cc
+++ b/net/socket_stream/socket_stream.cc
@@ -21,6 +21,7 @@
 #include "base/strings/utf_string_conversions.h"
 #include "net/base/auth.h"
 #include "net/base/io_buffer.h"
+#include "net/base/load_flags.h"
 #include "net/base/net_errors.h"
 #include "net/base/net_util.h"
 #include "net/dns/host_resolver.h"
@@ -630,7 +631,8 @@ int SocketStream::DoResolveProxy() {
   // Alternate-Protocol header here for ws:// or TLS NPN extension for wss:// .
 
   return context_->proxy_service()->ResolveProxy(
-      proxy_url_, &proxy_info_, io_callback_, &pac_request_, net_log_);
+      proxy_url_, LOAD_NORMAL, &proxy_info_, io_callback_, &pac_request_, NULL,
+      net_log_);
 }
 
 int SocketStream::DoResolveProxyComplete(int result) {