Windows: Make file_util::Delete("c:\\foo_dir", false) work correctly. Add more unit tests for Delete

chrome/installer/util/move_tree_work_item_unittest.cc

 // Copyright (c) 2009 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 <windows.h>
 
 #include <fstream>
 #include <iostream>
 
 #include "base/base_paths.h"
@@ skipping 21 matching lines @@
       // Create a tempory directory under the test directory.
       temp_dir_ = test_dir_.AppendASCII("temp");
       file_util::CreateDirectoryW(temp_dir_);
 
       ASSERT_TRUE(file_util::PathExists(test_dir_));
       ASSERT_TRUE(file_util::PathExists(temp_dir_));
     }
 
     virtual void TearDown() {
       // Clean up test directory
-      ASSERT_TRUE(file_util::Delete(test_dir_, false));
+      ASSERT_TRUE(file_util::Delete(test_dir_, true));
       ASSERT_FALSE(file_util::PathExists(test_dir_));
     }
 
     // the path to temporary directory used to contain the test operations
     FilePath test_dir_;
     FilePath temp_dir_;
   };
 
   // Simple function to dump some text into a new file.
   void CreateTextFile(const std::wstring& filename,
@@ skipping 332 matching lines @@
   EXPECT_TRUE(file_util::ContentsEqual(exe_full_path, to_file));
 
   // test rollback()
   work_item->Rollback();
 
   EXPECT_TRUE(file_util::PathExists(from_dir));
   EXPECT_TRUE(file_util::ContentsEqual(exe_full_path, from_file));
   EXPECT_TRUE(file_util::PathExists(to_dir));
   EXPECT_EQ(0, ReadTextFile(to_file.value()).compare(text_content_1));
 }