[Chromecast] Add proxy server support to chromecast

chromecast/net/connectivity_checker_impl.cc

Index: chromecast/net/connectivity_checker_impl.cc
diff --git a/chromecast/net/connectivity_checker_impl.cc b/chromecast/net/connectivity_checker_impl.cc
index b1b24eba9dc1f30eb8464738515fa3cab77764d0..56414f490d202ca7ca9916db8cad3ad9e2e191c0 100644
--- a/chromecast/net/connectivity_checker_impl.cc
+++ b/chromecast/net/connectivity_checker_impl.cc
@@ -18,8 +18,6 @@
 #include "net/http/http_response_headers.h"
 #include "net/http/http_response_info.h"
 #include "net/http/http_status_code.h"
-#include "net/proxy/proxy_config.h"
-#include "net/proxy/proxy_config_service_fixed.h"
 #include "net/socket/ssl_client_socket.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_context_builder.h"
@@ -58,13 +56,15 @@ const char kMetricNameNetworkConnectivityCheckingErrorType[] =
 }  // namespace
 
 ConnectivityCheckerImpl::ConnectivityCheckerImpl(
-    const scoped_refptr<base::SingleThreadTaskRunner>& task_runner)
+    const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
+    std::unique_ptr<net::ProxyConfigService> proxy_config_service)
     : ConnectivityChecker(),
       task_runner_(task_runner),
       connected_(false),
       connection_type_(net::NetworkChangeNotifier::CONNECTION_NONE),
       check_errors_(0),
-      network_changed_pending_(false) {
+      network_changed_pending_(false),
+      proxy_config_service_(std::move(proxy_config_service)) {
   DCHECK(task_runner_.get());
   task_runner->PostTask(FROM_HERE,
                         base::Bind(&ConnectivityCheckerImpl::Initialize, this));
@@ -79,9 +79,8 @@ void ConnectivityCheckerImpl::Initialize() {
       check_url_str.empty() ? kDefaultConnectivityCheckUrl : check_url_str));
 
   net::URLRequestContextBuilder builder;
-  builder.set_proxy_config_service(
-      base::MakeUnique<net::ProxyConfigServiceFixed>(
-          net::ProxyConfig::CreateDirect()));
+  builder.set_proxy_config_service(std::move(proxy_config_service_));
+
   builder.DisableHttpCache();
   url_request_context_ = builder.Build();