[Chromecast] Add proxy server support to chromecast

chromecast/browser/cast_browser_process.h

Index: chromecast/browser/cast_browser_process.h
diff --git a/chromecast/browser/cast_browser_process.h b/chromecast/browser/cast_browser_process.h
index af5ab10870a8d4d95aba4dad68150311cebc9839..693d2ed708e3e928601ec772f1f376826a07bb28 100644
--- a/chromecast/browser/cast_browser_process.h
+++ b/chromecast/browser/cast_browser_process.h
@@ -19,6 +19,7 @@ class CrashDumpManager;
 
 namespace net {
 class NetLog;
+class ProxyConfig;
 }  // namespace net
 
 namespace chromecast {
@@ -90,8 +91,10 @@ class CastBrowserProcess {
     return connectivity_checker_.get();
   }
   net::NetLog* net_log() const { return net_log_; }
+  net::ProxyConfig* proxy_config();
 
  private:
+  std::unique_ptr<net::ProxyConfig> proxy_config_;
   // Note: The following order should match the order they are set in
   // CastBrowserMainParts.
   std::unique_ptr<metrics::CastMetricsHelper> metrics_helper_;