Add a flag to open files in share delete mode

base/platform_file_unittest.cc

 // Copyright (c) 2011 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 "base/file_util.h"
 #include "base/platform_file.h"
 #include "base/scoped_temp_dir.h"
 #include "base/time.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 109 matching lines @@
       base::PLATFORM_FILE_READ,
       &created, &error_code);
   EXPECT_NE(base::kInvalidPlatformFileValue, file);
   EXPECT_TRUE(created);
   EXPECT_EQ(base::PLATFORM_FILE_OK, error_code);
 
   EXPECT_TRUE(base::ClosePlatformFile(file));
   EXPECT_FALSE(file_util::PathExists(file_path));
 }
 
+TEST(PlatformFile, DeleteOpenFile) {
+  ScopedTempDir temp_dir;
+  ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
+  FilePath file_path = temp_dir.path().AppendASCII("create_file_1");
+
+  // Create a file.
+  bool created = false;
+  base::PlatformFileError error_code = base::PLATFORM_FILE_OK;
+  base::PlatformFile file = base::CreatePlatformFile(
+      file_path,
+      base::PLATFORM_FILE_OPEN_ALWAYS |
+      base::PLATFORM_FILE_READ |
+      base::PLATFORM_FILE_SHARE_DELETE,
+      &created, &error_code);
+  EXPECT_NE(base::kInvalidPlatformFileValue, file);
+  EXPECT_TRUE(created);
+  EXPECT_EQ(base::PLATFORM_FILE_OK, error_code);
+
+  // Open an existing file and mark it as delete on close.
+  created = false;
+  base::PlatformFile same_file = base::CreatePlatformFile(
+      file_path,
+      base::PLATFORM_FILE_OPEN |
+      base::PLATFORM_FILE_DELETE_ON_CLOSE |
+      base::PLATFORM_FILE_READ,
+      &created, &error_code);
+  EXPECT_NE(base::kInvalidPlatformFileValue, file);
+  EXPECT_FALSE(created);
+  EXPECT_EQ(base::PLATFORM_FILE_OK, error_code);
+
+  // Close both handles and check that the file is gone.
+  base::ClosePlatformFile(file);
+  base::ClosePlatformFile(same_file);
+  EXPECT_FALSE(file_util::PathExists(file_path));
+}
+
 TEST(PlatformFile, ReadWritePlatformFile) {
   ScopedTempDir temp_dir;
   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
   FilePath file_path = temp_dir.path().AppendASCII("read_write_file");
   base::PlatformFile file = base::CreatePlatformFile(
       file_path,
       base::PLATFORM_FILE_CREATE |
       base::PLATFORM_FILE_READ |
       base::PLATFORM_FILE_WRITE,
       NULL, NULL);
@@ skipping 177 matching lines @@
   EXPECT_EQ(info.last_modified.ToInternalValue(),
             new_last_modified.ToInternalValue());
 #endif
 
   EXPECT_EQ(info.creation_time.ToInternalValue(),
             creation_time.ToInternalValue());
 
   // Close the file handle to allow the temp directory to be deleted.
   base::ClosePlatformFile(file);
 }