Reland "Move webrtc/{base => rtc_base}" (https://codereview.webrtc.org/2877023002)

Reland the base->rtc_base without adding stub headers (will be
done in follow-up CL). This preserves git blame history of all files.

BUG=webrtc:7634
NOTRY=True
TBR=kwiberg@webrtc.org

Change-Id: Iea3bb6f3f67b8374c96337b63e8f5aa3e6181012
Reviewed-on: https://chromium-review.googlesource.com/554611
Reviewed-by: Henrik Kjellander <kjellander@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#18821}
diff --git a/webrtc/rtc_base/proxyinfo.h b/webrtc/rtc_base/proxyinfo.h
new file mode 100644
index 0000000..89bb1b7
--- /dev/null
+++ b/webrtc/rtc_base/proxyinfo.h
@@ -0,0 +1,43 @@
+/*
+ *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_RTC_BASE_PROXYINFO_H_
+#define WEBRTC_RTC_BASE_PROXYINFO_H_
+
+#include <string>
+#include "webrtc/base/socketaddress.h"
+#include "webrtc/base/cryptstring.h"
+
+namespace rtc {
+
+enum ProxyType {
+  PROXY_NONE,
+  PROXY_HTTPS,
+  PROXY_SOCKS5,
+  PROXY_UNKNOWN
+};
+const char * ProxyToString(ProxyType proxy);
+
+struct ProxyInfo {
+  ProxyType type;
+  SocketAddress address;
+  std::string autoconfig_url;
+  bool autodetect;
+  std::string bypass_list;
+  std::string username;
+  CryptString password;
+
+  ProxyInfo();
+  ~ProxyInfo();
+};
+
+} // namespace rtc
+
+#endif // WEBRTC_RTC_BASE_PROXYINFO_H_