Revert of Removing HTTPS and SOCKS proxy server code.

webrtc/base/proxyinfo.cc

Index: webrtc/base/proxyinfo.cc
diff --git a/webrtc/base/proxyinfo.h b/webrtc/base/proxyinfo.cc
similarity index 60%
copy from webrtc/base/proxyinfo.h
copy to webrtc/base/proxyinfo.cc
index cd5c3875dd9ccffa5eb07bee68ec921d982bd7e6..76c7708286ec79724780b4a64a3181c6abe9174e 100644
--- a/webrtc/base/proxyinfo.h
+++ b/webrtc/base/proxyinfo.cc
@@ -8,20 +8,17 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#ifndef WEBRTC_BASE_PROXYINFO_H__
-#define WEBRTC_BASE_PROXYINFO_H__
+#include "webrtc/base/proxyinfo.h"
 
 namespace rtc {
 
-// TODO(deadbeef): Remove this; it's not used any more but it's referenced in
-// some places, including chromium.
-enum ProxyType {
-  PROXY_NONE,
-};
+const char * ProxyToString(ProxyType proxy) {
+  const char * const PROXY_NAMES[] = { "none", "https", "socks5", "unknown" };
+  return PROXY_NAMES[proxy];
+}
 
-struct ProxyInfo {
-};
+ProxyInfo::ProxyInfo() : type(PROXY_NONE), autodetect(false) {
+}
+ProxyInfo::~ProxyInfo() = default;
 
 } // namespace rtc
-
-#endif // WEBRTC_BASE_PROXYINFO_H__