Race TCP connection to proxies with QUIC connections

net/base/proxy_delegate.h

Index: net/base/proxy_delegate.h
diff --git a/net/base/proxy_delegate.h b/net/base/proxy_delegate.h
index ab6b2445f54bb3a4005a43b137e13110496ff5ee..1c5d60ac5ef86dcba5b27e9392ab07cbfb902a94 100644
--- a/net/base/proxy_delegate.h
+++ b/net/base/proxy_delegate.h
@@ -68,6 +68,21 @@ class NET_EXPORT ProxyDelegate {
   // allowed to push cross-origin resources.
   virtual bool IsTrustedSpdyProxy(const net::ProxyServer& proxy_server) = 0;
 
+  // GetAlternativeProxy is called after the proxy is resolved but before the

[RyanSturm, 2016/08/19 19:03:23]

s/GetAlternativeProxy is called/Called

[tbansal1, 2016/08/20 01:53:39]

Done.

+  // connection is established. |resolved_proxy_server| is the proxy server
+  // resolved by the proxy service for fetching |url|. GetAlternativeProxy

[RyanSturm, 2016/08/19 19:03:23]

s/GetAlternativeProxy should set/ Sets

[tbansal1, 2016/08/20 01:53:39]

Done.

+  // should set |alternative_proxy_server| to an alternative proxy server, if
+  // one is available to fetch |url|. |alternative_proxy_server| is owned by
+  // the caller, and is guaranteed to be non-null.
+  virtual void GetAlternativeProxy(
+      const GURL& url,
+      const ProxyServer& resolved_proxy_server,
+      ProxyServer* alternative_proxy_server) const {}
+
+  // Notifies the ProxyDelegate that |alternative_proxy_server| is broken.
+  virtual void OnAlternativeProxyBroken(
+      const ProxyServer& alternative_proxy_server) {}
+
  private:
   DISALLOW_COPY_AND_ASSIGN(ProxyDelegate);
 };