Add cloud_print to the GN build.

cloud_print/service/win/chrome_launcher.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 "cloud_print/service/win/chrome_launcher.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
@@ skipping 261 matching lines @@
   }
 
   base::FilePath printers_file = temp_user_data.path().Append(L"printers.json");
 
   base::ListValue printer_list;
   printer_list.AppendStrings(printers);
   std::string printers_json;
   base::JSONWriter::Write(printer_list, &printers_json);
   size_t written = base::WriteFile(printers_file,
                                    printers_json.c_str(),
-                                   printers_json.size());
+                                   static_cast<int>(printers_json.size()));
   if (written != printers_json.size()) {
     LOG(ERROR) << "Can't write file.";
     return std::string();
   }
 
   base::CommandLine cmd(chrome_path);
   CopyChromeSwitchesFromCurrentProcess(&cmd);
   cmd.AppendSwitchPath(switches::kUserDataDir, temp_user_data.path());
   cmd.AppendSwitchPath(switches::kCloudPrintSetupProxy, printers_file);
   cmd.AppendSwitch(switches::kNoServiceAutorun);
@@ skipping 28 matching lines @@
       LOG(ERROR) << "Chrome launch failed.";
       return std::string();
     }
     if (!json.empty()) {
       // Close chrome because Service State is ready.
       CloseChrome(chrome_process.Pass(), thread_id);
       return json;
     }
   }
 }