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 89bb50a277bb2a918abc0b815d27372a65bb312e..0b2aea7ccf88210f5a9daad8b36d02824f81439d 100644
--- a/chrome/browser/net/chrome_network_delegate.cc
+++ b/chrome/browser/net/chrome_network_delegate.cc
@@ -296,7 +296,8 @@ ChromeNetworkDelegate::ChromeNetworkDelegate(
       original_content_length_(0),
       first_request_(true),
       prerender_tracker_(NULL),
-      data_reduction_proxy_params_(NULL) {
+      data_reduction_proxy_params_(NULL),
+      on_resolve_proxy_handler_(NULL) {
   DCHECK(enable_referrers);
   extensions_delegate_.reset(
       ChromeExtensionsNetworkDelegate::Create(event_router));
@@ -468,6 +469,13 @@ int ChromeNetworkDelegate::OnBeforeURLRequest(
   return rv;
 }
 
+void ChromeNetworkDelegate::OnResolveProxy(
+    const GURL& url, int load_flags, net::ProxyInfo* result) {
+  if (on_resolve_proxy_handler_) {
+    on_resolve_proxy_handler_->Run(url, load_flags, result);
+  }
+}
+
 int ChromeNetworkDelegate::OnBeforeSendHeaders(
     net::URLRequest* request,
     const net::CompletionCallback& callback,