Allow chrome to handle 407 auth challenges to CONNECT requests

net/http/proxy_client_socket.h

Index: net/http/proxy_client_socket.h
===================================================================
--- net/http/proxy_client_socket.h	(revision 117986)
+++ net/http/proxy_client_socket.h	(working copy)
@@ -12,6 +12,7 @@
 
 class HttpStream;
 class HttpResponseInfo;
+class HttpAuthController;
 
 class NET_EXPORT_PRIVATE ProxyClientSocket : public StreamSocket {
  public:
@@ -26,6 +27,15 @@
   // which can be used to read the response body.
   virtual HttpStream* CreateConnectResponseStream() = 0;
 
+  // Returns the HttpAuthController which can be used
+  // to interact with an HTTP Proxy Authorization Required (407) request.
+  virtual const scoped_refptr<HttpAuthController>& auth_controller() = 0;
+
+  // If Connect (or its callback) returns PROXY_AUTH_REQUESTED, then
+  // credentials should be added to the HttpAuthController before calling
+  // RestartWithAuth.
+  virtual int RestartWithAuth(const CompletionCallback& callback) = 0;
+
  private:
   DISALLOW_COPY_AND_ASSIGN(ProxyClientSocket);
 };