Add ReadIfReady() for tcp_socket_win

net/socket/ssl_client_socket_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/socket/ssl_client_socket.h"
 
 #include <errno.h>
 #include <string.h>
 
 #include <algorithm>
@@ skipping 3761 matching lines @@
   // Read the response without writing a request, so the read will be pending.
   TestCompletionCallback read_callback;
   scoped_refptr<IOBuffer> buf(new IOBuffer(4096));
   rv = Read(sock_.get(), buf.get(), 4096, read_callback.callback());
   EXPECT_EQ(ERR_IO_PENDING, rv);
 
   // Dump memory again and check that |buffer_size| contain the read buffer.
   StreamSocket::SocketMemoryStats stats2;
   sock_->DumpMemoryStats(&stats2);
 
-  bool buffer_released = false;
   if (read_if_ready_enabled()) {
-// TODO(xunjieli): https://crbug.com/690915. Implement for windows.
-#if defined(OS_POSIX)
-    buffer_released = true;
-#endif
-  }
-  if (buffer_released) {
     EXPECT_EQ(0u, stats2.buffer_size);
     EXPECT_EQ(stats.cert_size, stats2.total_size);
   } else {
     EXPECT_EQ(17 * 1024u, stats2.buffer_size);
     EXPECT_LT(17 * 1024u, stats2.total_size);
   }
   EXPECT_EQ(1u, stats2.cert_count);
   EXPECT_LT(0u, stats2.cert_size);
 }
 
 }  // namespace net