Move PathExists to base namespace.

extensions/common/extension_paths.cc

 // Copyright (c) 2013 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 "extensions/common/extension_paths.h"
 
 #include "base/file_util.h"
 #include "base/path_service.h"
 
 namespace extensions {
 
 bool PathProvider(int key, base::FilePath* result) {
   switch (key) {
     case DIR_TEST_DATA: {
       base::FilePath cur;
       if (!PathService::Get(base::DIR_SOURCE_ROOT, &cur))
         return false;
       cur = cur.Append(FILE_PATH_LITERAL("extensions"));
       cur = cur.Append(FILE_PATH_LITERAL("test"));
       cur = cur.Append(FILE_PATH_LITERAL("data"));
-      if (!file_util::PathExists(cur))  // we don't want to create this
+      if (!base::PathExists(cur))  // we don't want to create this
         return false;
 
       *result = cur;
       return true;
       break;
     }
     default:
       return false;
   }
 
   return false;
 }
 
 // This cannot be done as a static initializer sadly since Visual Studio will
 // eliminate this object file if there is no direct entry point into it.
 void RegisterPathProvider() {
   PathService::RegisterProvider(PathProvider, PATH_START, PATH_END);
 }
 
 }  // namespace extensions