Move PathExists to base namespace.

chrome/browser/chromeos/drive/file_system/open_file_operation_unittest.cc

 // Copyright 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 "chrome/browser/chromeos/drive/file_system/open_file_operation.h"
 
 #include <set>
 
 #include "base/file_util.h"
 #include "base/files/file_path.h"
@@ skipping 29 matching lines @@
   const int64 file_size = src_entry.file_info().size();
 
   FileError error = FILE_ERROR_FAILED;
   base::FilePath file_path;
   operation_->OpenFile(
       file_in_root,
       google_apis::test_util::CreateCopyResultCallback(&error, &file_path));
   test_util::RunBlockingPoolTask();
 
   EXPECT_EQ(FILE_ERROR_OK, error);
-  ASSERT_TRUE(file_util::PathExists(file_path));
+  ASSERT_TRUE(base::PathExists(file_path));
   int64 local_file_size;
   ASSERT_TRUE(file_util::GetFileSize(file_path, &local_file_size));
   EXPECT_EQ(file_size, local_file_size);
 
   // The file_path should be added into the set.
   EXPECT_EQ(1, open_files_[file_in_root]);
 
   // Open again.
   error = FILE_ERROR_FAILED;
   operation_->OpenFile(
       file_in_root,
       google_apis::test_util::CreateCopyResultCallback(&error, &file_path));
   test_util::RunBlockingPoolTask();
 
   EXPECT_EQ(FILE_ERROR_OK, error);
-  ASSERT_TRUE(file_util::PathExists(file_path));
+  ASSERT_TRUE(base::PathExists(file_path));
   ASSERT_TRUE(file_util::GetFileSize(file_path, &local_file_size));
   EXPECT_EQ(file_size, local_file_size);
 
   // The file_path should be added into the set.
   EXPECT_EQ(2, open_files_[file_in_root]);
 }
 
 TEST_F(OpenFileOperationTest, NotFound) {
   const base::FilePath file_in_root(
       FILE_PATH_LITERAL("drive/root/not-exist.txt"));
 
   FileError error = FILE_ERROR_FAILED;
   base::FilePath file_path;
   operation_->OpenFile(
       file_in_root,
       google_apis::test_util::CreateCopyResultCallback(&error, &file_path));
   test_util::RunBlockingPoolTask();
   EXPECT_EQ(FILE_ERROR_NOT_FOUND, error);
 
   // The file shouldn't be in the set of opened files.
   EXPECT_EQ(0U, open_files_.count(file_in_root));
 }
 
 }  // namespace file_system
 }  // namespace drive