Remove code for Mac and Linux virtual print drivers.

cloud_print/virtual_driver/posix/printer_driver_util_linux.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.
-
-#include <cups/backend.h>
-
-#include "base/base_paths.h"
-#include "base/command_line.h"
-#include "base/file_path.h"
-#include "base/logging.h"
-#include "base/path_service.h"
-
-#include "cloud_print/virtual_driver/posix/printer_driver_util_posix.h"
-#include "cloud_print/virtual_driver/virtual_driver_switches.h"
-
-namespace printer_driver_util {
-
-void LaunchPrintDialog(const std::string& output_path,
-                       const std::string& job_title,
-                       const std::string& current_user,
-                       const std::string& print_ticket) {
-  std::string set_var;
-
-  // Set Environment variable to control display.
-  set_var = "/home/" + current_user + "/.Xauthority";
-  if (setenv("DISPLAY", ":0.0", 0) == -1) {
-    LOG(ERROR) << "Unable to set DISPLAY environment variable";
-  }
-  if (setenv("XAUTHORITY", set_var.c_str(), 0) == -1) {
-    LOG(ERROR) << "Unable to set XAUTHORITY environment variable";
-  }
-
-  // Construct the call to Chrome
-  FilePath chrome_path("google-chrome");
-  FilePath job_path(output_path);
-  CommandLine command_line(chrome_path);
-  command_line.AppendSwitchPath(switches::kCloudPrintFile, job_path);
-  command_line.AppendSwitchNative(switches::kCloudPrintJobTitle, job_title);
-  command_line.AppendSwitch(switches::kCloudPrintDeleteFile);
-  command_line.AppendSwitchNative(switches::kCloudPrintPrintTicket,
-                                  print_ticket);
-  LOG(INFO) << "Call to chrome is " << command_line.GetCommandLineString();
-  if (system(command_line.GetCommandLineString().c_str()) == -1) {
-    LOG(ERROR) << "Unable to call Chrome";
-    exit(CUPS_BACKEND_CANCEL);
-  }
-  LOG(INFO) << "Call to Chrome succeeded";
-}
-
-}  // namespace printer_driver_util
-