Move PathExists to base namespace.

chrome/browser/importer/firefox_importer_utils_mac.mm

 // Copyright (c) 2011 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 <Cocoa/Cocoa.h>
 #include <sys/param.h>
 
 #include "chrome/browser/importer/firefox_importer_utils.h"
 
 #include "base/file_util.h"
 #include "base/mac/foundation_util.h"
 #include "base/path_service.h"
 
 base::FilePath GetProfilesINI() {
   base::FilePath app_data_path;
   if (!PathService::Get(base::DIR_APP_DATA, &app_data_path)) {
     return base::FilePath();
   }
   base::FilePath ini_file =
       app_data_path.Append("Firefox").Append("profiles.ini");
-  if (!file_util::PathExists(ini_file)) {
+  if (!base::PathExists(ini_file)) {
     return base::FilePath();
   }
   return ini_file;
 }
 
 base::FilePath GetFirefoxDylibPath() {
   CFURLRef appURL = nil;
   if (LSFindApplicationForInfo(kLSUnknownCreator,
                               CFSTR("org.mozilla.firefox"),
                               NULL,
                               NULL,
                               &appURL) != noErr) {
     return base::FilePath();
   }
   NSBundle *ff_bundle =
       [NSBundle bundleWithPath:[base::mac::CFToNSCast(appURL) path]];
   CFRelease(appURL);
   NSString *ff_library_path =
       [[ff_bundle executablePath] stringByDeletingLastPathComponent];
   char buf[MAXPATHLEN];
   if (![ff_library_path getFileSystemRepresentation:buf maxLength:sizeof(buf)])
     return base::FilePath();
   return base::FilePath(buf);
 }