Make callers of CommandLine use it via the base:: namespace.

chrome/browser/extensions/api/messaging/native_process_launcher_win.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 <windows.h>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 70 matching lines @@
   if (!manifest_path.IsAbsolute()) {
     *error_message = "Path to native messaging host manifest must be absolute.";
     return base::FilePath();
   }
 
   return manifest_path;
 }
 
 // static
 bool NativeProcessLauncher::LaunchNativeProcess(
-    const CommandLine& command_line,
+    const base::CommandLine& command_line,
     base::Process* process,
     base::File* read_file,
     base::File* write_file) {
   // Timeout for the IO pipes.
   const DWORD kTimeoutMs = 5000;
 
   // Windows will use default buffer size when 0 is passed to
   // CreateNamedPipeW().
   const DWORD kBufferSize = 0;
 
@@ skipping 68 matching lines @@
   }
 
   *process = cmd_process.Pass();
   *read_file = base::File(stdout_pipe.Take());
   *write_file = base::File(stdin_pipe.Take());
 
   return true;
 }
 
 }  // namespace extensions