[Chromecast] Add proxy server support to chromecast

chromecast/net/connectivity_checker_impl.h

Index: chromecast/net/connectivity_checker_impl.h
diff --git a/chromecast/net/connectivity_checker_impl.h b/chromecast/net/connectivity_checker_impl.h
index 8779d0cc6bf92fff149f247df4f69b1491a49e72..ef0edb7416dd7eaee27e08cf6b4a468ff3cb3d7b 100644
--- a/chromecast/net/connectivity_checker_impl.h
+++ b/chromecast/net/connectivity_checker_impl.h
@@ -9,6 +9,7 @@
 #include "base/macros.h"
 #include "chromecast/net/connectivity_checker.h"
 #include "net/base/network_change_notifier.h"
+#include "net/proxy/proxy_config.h"
 #include "net/url_request/url_request.h"
 
 class GURL;
@@ -34,7 +35,8 @@ class ConnectivityCheckerImpl
  public:
   // Connectivity checking and initialization will run on task_runner.
   explicit ConnectivityCheckerImpl(
-      const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
+      const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
+      net::ProxyConfig& proxy_config);
 
   // ConnectivityChecker implementation:
   bool Connected() const override;
@@ -99,6 +101,8 @@ class ConnectivityCheckerImpl
   // called.
   base::CancelableCallback<void()> timeout_;
 
+  net::ProxyConfig proxy_config_;
+
   DISALLOW_COPY_AND_ASSIGN(ConnectivityCheckerImpl);
 };