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

chrome/installer/util/lzma_util_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 "base/file_util.h"
 #include "base/path_service.h"
 #include "base/process_util.h"
 #include "chrome/common/chrome_paths.h"
@@ skipping 13 matching lines @@
     test_dir_ = test_dir_.AppendASCII("LzmaUtilTest");
 
     // Create a fresh, empty copy of this test directory.
     file_util::Delete(test_dir_, true);
     file_util::CreateDirectoryW(test_dir_);
     ASSERT_TRUE(file_util::PathExists(test_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_;
 
   // The path to input data used in tests.
   FilePath data_dir_;
 };
 };
@@ skipping 78 matching lines @@
   archive = data_dir_.AppendASCII("archive2.7z");
   EXPECT_EQ(LzmaUtil::UnPackArchive(archive.value(), extract_dir.value(),
                                     &unpacked_file), NO_ERROR);
   EXPECT_TRUE(file_util::PathExists(extract_dir.AppendASCII("b.exe")));
   EXPECT_TRUE(unpacked_file == extract_dir.AppendASCII("b.exe").value());
 
   archive = data_dir_.AppendASCII("invalid_archive.7z");
   EXPECT_NE(LzmaUtil::UnPackArchive(archive.value(), extract_dir.value(),
                                     &unpacked_file), NO_ERROR);
 }