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

chrome/browser/extensions/api/messaging/native_process_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 "chrome/browser/extensions/api/messaging/native_process_launcher.h"
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/command_line.h"
@@ skipping 164 matching lines @@
   // report the NOT_FOUND error.
   if (!base::PathExists(host_path)) {
     LOG(ERROR)
         << "Found manifest, but not the binary for native messaging host "
         << native_host_name << ". Host path specified in the manifest: "
         << host_path.AsUTF8Unsafe();
     PostErrorResult(callback, RESULT_NOT_FOUND);
     return;
   }
 
-  CommandLine command_line(host_path);
+  base::CommandLine command_line(host_path);
   command_line.AppendArg(origin.spec());
 
   // Pass handle of the native view window to the native messaging host. This
   // way the host will be able to create properly focused UI windows.
 #if defined(OS_WIN)
   command_line.AppendSwitchASCII(kParentWindowSwitchName,
                                  base::Int64ToString(window_handle_));
 #endif  // !defined(OS_WIN)
 
   base::Process process;
@@ skipping 67 matching lines @@
   intptr_t window_handle = 0;
 #if defined(OS_WIN)
   window_handle = reinterpret_cast<intptr_t>(
       views::HWNDForNativeView(native_view));
 #endif
   return scoped_ptr<NativeProcessLauncher>(
       new NativeProcessLauncherImpl(allow_user_level_hosts, window_handle));
 }
 
 }  // namespace extensions