Remove code for Mac and Linux virtual print drivers.

cloud_print/virtual_driver/posix/printer_driver_util_posix.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 <pwd.h>
-#include <stdio.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-
-#include <cups/backend.h>
-
-#include "base/json/json_writer.h"
-#include "base/logging.h"
-#include "base/string_tokenizer.h"
-#include "base/values.h"
-
-#include "cloud_print/virtual_driver/posix/printer_driver_util_posix.h"
-
-namespace printer_driver_util {
-
-void WriteToTemp(FILE* input_pdf, FilePath output_path) {
-  FILE* output_pdf;
-  char buffer[128];
-  output_pdf = fopen(output_path.value().c_str(), "w");
-  if (output_pdf == NULL) {
-    LOG(ERROR) << "Unable to open file handle for writing output file";
-    exit(CUPS_BACKEND_CANCEL);
-  }
-  // Read from input file or stdin and write to output file.
-  while (fgets(buffer, sizeof(buffer), input_pdf) != NULL) {
-    fputs(buffer, output_pdf);
-  }
-
-  LOG(INFO) << "Successfully wrote output file";
-  // ensure everything is written, then close the files.
-  fflush(output_pdf);
-  fclose(input_pdf);
-  fclose(output_pdf);
-}
-
-// Sets the UID of the process to that of the username.
-void SetUser(const char* user) {
-  struct passwd* calling_user = NULL;
-  calling_user = getpwnam(user);
-  if (calling_user == NULL) {
-    LOG(ERROR) << "Unable to get calling user";
-    exit(CUPS_BACKEND_CANCEL);
-  }
-  if (!setuid(calling_user->pw_uid) == -1)  {
-    LOG(ERROR) << "Unable to set UID";
-    exit(CUPS_BACKEND_CANCEL);
-  }
-
-  LOG(INFO) << "Successfully set user and group ID";
-}
-
-// Parses the options passed in on the command line to key value
-// JSON pairs. Assumes that the input options string is of the
-// format KEY=VALUE, with expressions being separated by spaces.
-// Fails if print_ticket cannot be written to.
-void GetOptions(const char* options, std::string* print_ticket) {
-  if (options == NULL) {
-    *(print_ticket) = "{}";
-    return;
-  }
-  CStringTokenizer t(options, options + strlen(options), " ");
-  DictionaryValue* json_options = new DictionaryValue;
-
-  while (t.GetNext()) {
-    std::string token = t.token();
-    // If the token ends with a slash, that indicates
-    // that the next space is actually escaped
-    // So we append the next token onto this token
-    // if possible. We also replace the slash with a space
-    // since the JSON will expect an unescaped string.
-    while (token.at(token.length()-1) == '\\') {
-      if (t.GetNext()) {
-        token.replace(token.length()-1, 1, " ");
-        token.append(t.token());
-      } else {
-        break;
-      }
-    }
-    size_t pos = token.find("=");
-    if (pos == std::string::npos) {
-      continue;
-    }
-    std::string option_name = token.substr(0, pos);
-    std::string option_value = token.substr(pos+1);
-    base::StringValue* val= base::Value::CreateStringValue(option_value);
-    json_options->SetWithoutPathExpansion(option_name, val);
-  }
-  base::JSONWriter::Write(json_options, /*pretty_print=*/false, print_ticket);
-  delete json_options;
-}
-
-}  // namespace printer_driver_util
-