Add list of plugged-in USB devices to feedback reports

chrome/browser/chromeos/system_logs/command_line_log_source.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/chromeos/system_logs/command_line_log_source.h"
 
 #include <stddef.h>
 
 #include <string>
 #include <vector>
@@ skipping 62 matching lines @@
   if (base::SysInfo::IsRunningOnChromeOS()) {
     // The following command would hang if run in Linux Chrome OS build on a
     // Linux Workstation.
     command = base::CommandLine(base::FilePath("/bin/sh"));
     command.AppendArg("-c");
     command.AppendArg(
         "/usr/bin/du -h / | grep -v -e \\/home\\/.*\\/Downloads\\/");
     commands.push_back(std::make_pair("system_files", command));
   }
 
+  // Track the list of plugged-in USB devices.
+  command = base::CommandLine(base::FilePath("/bin/sh"));
+  command.AppendArg("-c");
+  command.AppendArg("/usr/bin/lsusb -t");
+  commands.emplace_back("usb_devices", command);

[xiyuan, 2017/05/02 06:07:04]

Do you want to update other push_back s ?

+
   // Get disk space usage information
   command = base::CommandLine(base::FilePath("/bin/df"));
   commands.push_back(std::make_pair("disk_usage", command));
 
   for (size_t i = 0; i < commands.size(); ++i) {
     VLOG(1) << "Executting System Logs Command: " << commands[i].first;
     std::string output;
     base::GetAppOutput(commands[i].second, &output);
     (*response)[commands[i].first] = output;
   }
@@ skipping 15 matching lines @@
 
   SystemLogsResponse* response = new SystemLogsResponse;
   base::PostTaskWithTraitsAndReply(FROM_HERE,
                                    base::TaskTraits().MayBlock().WithPriority(
                                        base::TaskPriority::BACKGROUND),
                                    base::Bind(&ExecuteCommandLines, response),
                                    base::Bind(callback, base::Owned(response)));
 }
 
 }  // namespace system_logs