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 6ef937414ede7db9d576657e8456e546a1cd4ba0..4e81a7bd4a102768eda9b363b662cf17e70c37b6 100644
--- a/chrome/browser/net/chrome_network_delegate.cc
+++ b/chrome/browser/net/chrome_network_delegate.cc
@@ -475,6 +475,14 @@ 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,