Pepper: Add a test for PPB_TCPSocket_Private.

ppapi/cpp/private/flash_tcp_socket.cc

 // Copyright (c) 2011 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.
 
-// TODO(yzshen): See the comment in corresponding .h file.
-
 #include "ppapi/cpp/private/flash_tcp_socket.h"
 
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/cpp/completion_callback.h"
 #include "ppapi/cpp/instance.h"
 #include "ppapi/cpp/module.h"
 #include "ppapi/cpp/module_impl.h"
 
 namespace pp {
 
 namespace {
 
 template <> const char* interface_name<PPB_Flash_TCPSocket>() {
   return PPB_FLASH_TCPSOCKET_INTERFACE;
 }
 
 }  // namespace
 
 namespace flash {
 
 TCPSocket::TCPSocket(Instance* instance) {
   if (has_interface<PPB_Flash_TCPSocket>() && instance) {
     PassRefFromConstructor(get_interface<PPB_Flash_TCPSocket>()->Create(
         instance->pp_instance()));
   }
 }
 
+// static
+bool TCPSocket::IsAvailable() {
+  return has_interface<PPB_Flash_TCPSocket>();
+}
+
 int32_t TCPSocket::Connect(const char* host,
                            uint16_t port,
                            const CompletionCallback& callback) {
   if (!has_interface<PPB_Flash_TCPSocket>())
     return callback.MayForce(PP_ERROR_NOINTERFACE);
   return get_interface<PPB_Flash_TCPSocket>()->Connect(
       pp_resource(), host, port, callback.pp_completion_callback());
 }
 
 int32_t TCPSocket::ConnectWithNetAddress(const PP_NetAddress_Private* addr,
@@ skipping 50 matching lines @@
 }
 
 void TCPSocket::Disconnect() {
   if (!has_interface<PPB_Flash_TCPSocket>())
     return;
   return get_interface<PPB_Flash_TCPSocket>()->Disconnect(pp_resource());
 }
 
 }  // namespace flash
 }  // namespace pp