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

media/video/capture/file_video_capture_device_factory.cc

 // Copyright 2014 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 "media/video/capture/file_video_capture_device_factory.h"
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/strings/sys_string_conversions.h"
 #include "media/base/media_switches.h"
 #include "media/video/capture/file_video_capture_device.h"
 
 namespace media {
 
 const char kFileVideoCaptureDeviceName[] =
     "/dev/placeholder-for-file-backed-fake-capture-device";
 
 // Inspects the command line and retrieves the file path parameter.
 base::FilePath GetFilePathFromCommandLine() {
   base::FilePath command_line_file_path =
-      CommandLine::ForCurrentProcess()->GetSwitchValuePath(
+      base::CommandLine::ForCurrentProcess()->GetSwitchValuePath(
           switches::kUseFileForFakeVideoCapture);
   CHECK(!command_line_file_path.empty());
   return command_line_file_path;
 }
 
 scoped_ptr<VideoCaptureDevice> FileVideoCaptureDeviceFactory::Create(
     const VideoCaptureDevice::Name& device_name) {
   DCHECK(thread_checker_.CalledOnValidThread());
 #if defined(OS_WIN)
   return scoped_ptr<VideoCaptureDevice>(new FileVideoCaptureDevice(
@@ skipping 32 matching lines @@
   DCHECK(thread_checker_.CalledOnValidThread());
   base::File file =
       FileVideoCaptureDevice::OpenFileForRead(GetFilePathFromCommandLine());
   VideoCaptureFormat capture_format;
   FileVideoCaptureDevice::ParseFileAndExtractVideoFormat(&file,
                                                          &capture_format);
   supported_formats->push_back(capture_format);
 }
 
 }  // namespace media