Move PathExists to base namespace.

ui/base/resource/resource_bundle_ios.mm

 // Copyright 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 "ui/base/resource/resource_bundle.h"
 
 #import <QuartzCore/QuartzCore.h>
 #import <UIKit/UIKit.h>
 
 #include "base/basictypes.h"
@@ skipping 64 matching lines @@
 
   if (delegate_) {
     locale_file_path =
         delegate_->GetPathForLocalePack(locale_file_path, app_locale);
   }
 
   // Don't try to load empty values or values that are not absolute paths.
   if (locale_file_path.empty() || !locale_file_path.IsAbsolute())
     return base::FilePath();
 
-  if (test_file_exists && !file_util::PathExists(locale_file_path))
+  if (test_file_exists && !base::PathExists(locale_file_path))
     return base::FilePath();
 
   return locale_file_path;
 }
 
 gfx::Image& ResourceBundle::GetNativeImageNamed(int resource_id, ImageRTL rtl) {
   // Flipped images are not used on iOS.
   DCHECK_EQ(rtl, RTL_DISABLED);
 
   // Check to see if the image is already in the cache.
@@ skipping 84 matching lines @@
 
   // Another thread raced the load and has already cached the image.
   if (images_.count(resource_id))
     return images_[resource_id];
 
   images_[resource_id] = image;
   return images_[resource_id];
 }
 
 }  // namespace ui