PPB_TCPSocket: add support for TCP server socket operations.

ppapi/tests/test_tcp_socket.h

 // Copyright 2013 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.
 
 #ifndef PAPPI_TESTS_TEST_TCP_SOCKET_H_
 #define PAPPI_TESTS_TEST_TCP_SOCKET_H_
 
 #include <string>
 
 #include "ppapi/c/pp_stdint.h"
 #include "ppapi/cpp/net_address.h"
 #include "ppapi/tests/test_case.h"
 
 namespace pp {
 class TCPSocket;
 }
 
 class TestTCPSocket: public TestCase {
  public:
   explicit TestTCPSocket(TestingInstance* instance);
 
   // TestCase implementation.
   virtual bool Init();
   virtual void RunTests(const std::string& filter);
 
  private:
   std::string TestConnect();
   std::string TestReadWrite();
   std::string TestSetOption();
+  std::string TestListen();
+  std::string TestBacklog();
 
-  int32_t ReadFirstLineFromSocket(pp::TCPSocket* socket, std::string* s);
-  int32_t WriteStringToSocket(pp::TCPSocket* socket, const std::string& s);
+  std::string ReadFirstLineFromSocket(pp::TCPSocket* socket, std::string* s);
+  std::string ReadFromSocket(pp::TCPSocket* socket,
+                             char* buffer,
+                             size_t num_bytes);
+  std::string WriteToSocket(pp::TCPSocket* socket, const std::string& s);
+  std::string GetAddressToBind(pp::NetAddress* address);
+  std::string StartListen(pp::TCPSocket* socket, int32_t backlog);
 
   pp::NetAddress addr_;
 };
 
 #endif  // PAPPI_TESTS_TEST_TCP_SOCKET_H_