Add device port unmapping support to forwarder2.

tools/android/forwarder2/device_forwarder_main.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 <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 
 #include <string>
 
@@ skipping 44 matching lines @@
     signal(SIGTERM, KillHandler);
     signal(SIGINT, KillHandler);
     controller_thread_.reset(new base::Thread("controller_thread"));
     controller_thread_->Start();
   }
 
   virtual void OnClientConnected(scoped_ptr<Socket> client_socket) OVERRIDE {
     char buf[kBufSize];
     const int bytes_read = client_socket->Read(buf, sizeof(buf));
     if (bytes_read <= 0) {
-      if (client_socket->exited())
+      if (client_socket->DidReceiveEvent())
         return;
       PError("Read()");
       return;
     }
     const std::string adb_socket_path(buf, bytes_read);
     if (adb_socket_path == adb_socket_path_) {
       client_socket->WriteString("OK");
       return;
     }
     if (!adb_socket_path_.empty()) {
@@ skipping 95 matching lines @@
     return 1;
   return client_delegate.has_failed();
 }
 
 }  // namespace
 }  // namespace forwarder2
 
 int main(int argc, char** argv) {
   return forwarder2::RunDeviceForwarder(argc, argv);
 }