Add Finch experiment for selectively bypassing proxies.

chrome/browser/net/chrome_network_delegate.cc

Index: chrome/browser/net/chrome_network_delegate.cc
diff --git a/chrome/browser/net/chrome_network_delegate.cc b/chrome/browser/net/chrome_network_delegate.cc
index 6558ae123a8d01eac386242f1b1d44222e8e392a..40140e3e0aea04f6389cd0c9aeb60570d7a9ee11 100644
--- a/chrome/browser/net/chrome_network_delegate.cc
+++ b/chrome/browser/net/chrome_network_delegate.cc
@@ -474,6 +474,14 @@ int ChromeNetworkDelegate::OnBeforeURLRequest(
   return rv;
 }
 
+void ChromeNetworkDelegate::OnResolveProxy(
+    const GURL& url, int load_flags, net::ProxyInfo* result) {
+  if (!on_resolve_proxy_handler_.is_null()) {
+    on_resolve_proxy_handler_.Run(url, load_flags,
+                                  data_reduction_proxy_params_, result);
+  }
+}
+
 int ChromeNetworkDelegate::OnBeforeSendHeaders(
     net::URLRequest* request,
     const net::CompletionCallback& callback,