Move socklen_t definition for windows to win32.h.

Bug: webrtc:6853
Change-Id: Ie73cd959707b32b928acdabd46329830b2bb2c27
Reviewed-on: https://webrtc-review.googlesource.com/78720
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23381}
diff --git a/rtc_base/win32.h b/rtc_base/win32.h
index 4e91687..b20f3f3 100644
--- a/rtc_base/win32.h
+++ b/rtc_base/win32.h
@@ -27,6 +27,8 @@
 #include <winsock2.h>
 #include <windows.h>
 
+typedef int socklen_t;
+
 #ifndef SECURITY_MANDATORY_LABEL_AUTHORITY
 // Add defines that we use if we are compiling against older sdks
 #define SECURITY_MANDATORY_MEDIUM_RID               (0x00002000L)
@@ -40,9 +42,6 @@
 
 #include <string>
 
-#include "rtc_base/basictypes.h"
-#include "rtc_base/stringutils.h"
-
 namespace rtc {
 
 const char* win32_inet_ntop(int af, const void *src, char* dst, socklen_t size);