Pass ID of the calling extension to the native messaging host.

chrome/browser/extensions/api/messaging/native_process_launcher_posix.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 "chrome/browser/extensions/api/messaging/native_process_launcher.h"
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/posix/eintr_wrapper.h"
@@ skipping 19 matching lines @@
     const std::string& native_host_name,
     std::string* error_message) {
   base::FilePath manifest_path =
       base::FilePath(kNativeMessagingDirectory).Append(
           native_host_name + ".json");
   return NativeMessagingHostManifest::Load(manifest_path, error_message);
 }
 
 // static
 bool NativeProcessLauncher::LaunchNativeProcess(
-    const base::FilePath& path,
+    const CommandLine& command_line,
     base::PlatformFile* read_file,
     base::PlatformFile* write_file) {
   base::FileHandleMappingVector fd_map;
 
   int read_pipe_fds[2] = {0};
   if (HANDLE_EINTR(pipe(read_pipe_fds)) != 0) {
     LOG(ERROR) << "Bad read pipe";
     return false;
   }
   file_util::ScopedFD read_pipe_read_fd(&read_pipe_fds[0]);
   file_util::ScopedFD read_pipe_write_fd(&read_pipe_fds[1]);
   fd_map.push_back(std::make_pair(*read_pipe_write_fd, STDOUT_FILENO));
 
   int write_pipe_fds[2] = {0};
   if (HANDLE_EINTR(pipe(write_pipe_fds)) != 0) {
     LOG(ERROR) << "Bad write pipe";
     return false;
   }
   file_util::ScopedFD write_pipe_read_fd(&write_pipe_fds[0]);
   file_util::ScopedFD write_pipe_write_fd(&write_pipe_fds[1]);
   fd_map.push_back(std::make_pair(*write_pipe_read_fd, STDIN_FILENO));
 
-  CommandLine line(path);
   base::LaunchOptions options;
   options.fds_to_remap = &fd_map;
   int process_id;
-  if (!base::LaunchProcess(line, options, &process_id)) {
+  if (!base::LaunchProcess(command_line, options, &process_id)) {
     LOG(ERROR) << "Error launching process";
     return false;
   }
 
   // We will not be reading from the write pipe, nor writing from the read pipe.
   write_pipe_read_fd.reset();
   read_pipe_write_fd.reset();
 
   *read_file = *read_pipe_read_fd.release();
   *write_file = *write_pipe_write_fd.release();
 
   return true;
 }
 
 }  // namespace extensions