[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..10dcc45fb95a92fde39923aa31cb1fa6f339de59 100644
--- a/chromecast/net/connectivity_checker_impl.h
+++ b/chromecast/net/connectivity_checker_impl.h
@@ -8,6 +8,7 @@
 #include "base/cancelable_callback.h"
 #include "base/macros.h"
 #include "chromecast/net/connectivity_checker.h"
+#include "components/proxy_config/pref_proxy_config_tracker_impl.h"
 #include "net/base/network_change_notifier.h"
 #include "net/url_request/url_request.h"
 
@@ -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,
+      std::unique_ptr<net::ProxyConfigService> proxy_config_service);
 
   // ConnectivityChecker implementation:
   bool Connected() const override;
@@ -99,6 +101,8 @@ class ConnectivityCheckerImpl
   // called.
   base::CancelableCallback<void()> timeout_;
 
+  std::unique_ptr<net::ProxyConfigService> proxy_config_service_;
+
   DISALLOW_COPY_AND_ASSIGN(ConnectivityCheckerImpl);
 };