[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..49e5e467471cd6257361e3e8d655b0c2ce73f577 100644
--- a/chromecast/net/connectivity_checker_impl.h
+++ b/chromecast/net/connectivity_checker_impl.h
@@ -21,6 +21,7 @@ namespace net {
 class SSLInfo;
 class URLRequest;
 class URLRequestContext;
+class URLRequestContextGetter;
 }
 
 namespace chromecast {
@@ -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::URLRequestContextGetter* url_request_context_getter);
 
   // ConnectivityChecker implementation:
   bool Connected() const override;
@@ -52,7 +54,7 @@ class ConnectivityCheckerImpl
                              bool fatal) override;
 
   // Initializes ConnectivityChecker
-  void Initialize();
+  void Initialize(net::URLRequestContextGetter* url_request_context_getter);
 
   // net::NetworkChangeNotifier::NetworkChangeObserver implementation:
   void OnNetworkChanged(
@@ -81,7 +83,7 @@ class ConnectivityCheckerImpl
   void CheckInternal();
 
   std::unique_ptr<GURL> connectivity_check_url_;
-  std::unique_ptr<net::URLRequestContext> url_request_context_;
+  net::URLRequestContext* url_request_context_;
   std::unique_ptr<net::URLRequest> url_request_;
   const scoped_refptr<base::SingleThreadTaskRunner> task_runner_;