[Remoting Linux] Allow native messaging host to specify host config path

remoting/host/setup/daemon_controller_delegate_linux.cc

 // Copyright 2013 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 "remoting/host/setup/daemon_controller_delegate_linux.h"
 
 #include <unistd.h>
 
 #include "base/base_paths.h"
 #include "base/bind.h"
@@ skipping 19 matching lines @@
 #include "remoting/host/host_config.h"
 #include "remoting/host/usage_stats_consent.h"
 
 namespace remoting {
 
 namespace {
 
 const char kDaemonScript[] =
     "/opt/google/chrome-remote-desktop/chrome-remote-desktop";
 
+// The name of the command-line switch used to specify the host configuration
+// file to use.
+const char kHostConfigSwitchName[] = "host-config";
+
 base::FilePath GetConfigPath() {
+  base::CommandLine* current_process = base::CommandLine::ForCurrentProcess();

[Sergey Ulanov, 2016/12/16 22:22:11]

This code runs in native messaging host. How are you going to pass command-line
flag to native messaging host process?

+  if (current_process->HasSwitch(kHostConfigSwitchName)) {
+    return current_process->GetSwitchValuePath(kHostConfigSwitchName);
+  }
   std::string filename =
       "host#" + base::MD5String(net::GetHostName()) + ".json";
   base::FilePath homedir;
   PathService::Get(base::DIR_HOME, &homedir);
   return homedir.Append(".config/chrome-remote-desktop").Append(filename);
 }
 
 bool GetScriptPath(base::FilePath* result) {
   base::FilePath candidate_exe(kDaemonScript);
   if (access(candidate_exe.value().c_str(), X_OK) == 0) {
@@ skipping 178 matching lines @@
   consent.set_by_policy = false;
   return consent;
 }
 
 scoped_refptr<DaemonController> DaemonController::Create() {
   return new DaemonController(
       base::WrapUnique(new DaemonControllerDelegateLinux()));
 }
 
 }  // namespace remoting