winhttp/tests: Compile with -D__WINESRC__.

dlls/winhttp/tests/Makefile.in

 TESTDLL   = winhttp.dll
 IMPORTS   = winhttp oleaut32 ole32 crypt32 advapi32 ws2_32
-EXTRADEFS = -U__WINESRC__ -DWINE_STRICT_PROTOTYPES -DWINE_NO_NAMELESS_EXTENSION -DWIDL_C_INLINE_WRAPPERS
 
 C_SRCS = \
 	notification.c \

dlls/winhttp/tests/notification.c

@@ -420,7 +420,7 @@ static void test_async( void )
     info.test  = async_test;
     info.count = sizeof(async_test) / sizeof(async_test[0]);
     info.index = 0;
-    info.wait = CreateEvent( NULL, FALSE, FALSE, NULL );
+    info.wait = CreateEventW( NULL, FALSE, FALSE, NULL );
 
     ses = WinHttpOpen( user_agent, 0, NULL, NULL, WINHTTP_FLAG_ASYNC );
     ok(ses != NULL, "failed to open session %u\n", GetLastError());

dlls/winhttp/tests/winhttp.c

@@ -28,7 +28,6 @@
 #include <winhttp.h>
 #include <wincrypt.h>
 #include <winreg.h>
-#include <winsock.h>
 #include "initguid.h"
 #include <httprequest.h>
 
@@ -350,7 +349,7 @@ static void test_SendRequest (void)
     ret = WinHttpReadData(request, buffer, sizeof(buffer) - 1, &bytes_rw);
     ok(ret == TRUE, "WinHttpReadData failed: %u.\n", GetLastError());
 
-    ok(bytes_rw == strlen(test_post), "Read %u bytes instead of %d.\n", bytes_rw, lstrlen(test_post));
+    ok(bytes_rw == strlen(test_post), "Read %u bytes instead of %d.\n", bytes_rw, lstrlenA(test_post));
     ok(strncmp(buffer, test_post, bytes_rw) == 0, "Data read did not match, got '%s'.\n", buffer);
 
     ret = WinHttpCloseHandle(request);
@@ -3023,7 +3022,7 @@ START_TEST (winhttp)
     test_WinHttpGetProxyForUrl();
     test_chunked_read();
 
-    si.event = CreateEvent(NULL, 0, 0, NULL);
+    si.event = CreateEventW(NULL, 0, 0, NULL);
     si.port = 7532;
 
     thread = CreateThread(NULL, 0, server_thread, (LPVOID)&si, 0, NULL);