Introduce AsyncFileTestHelper for testing with async file/quota operations

Also gradually deprecate FileUtilHelper since its code is no longer
used in the actual code path (used only in unittests).

BUG=146215
TEST=content_unittests:LocalFileSystem*
TBR=jam@chromium.org

Review URL: https://codereview.chromium.org/12223006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@181278 0039d316-1c4b-4281-b951-d872f2087c98

9 files changed, 412 insertions, 287 deletions

diff --git a/webkit/fileapi/async_file_test_helper.cc b/webkit/fileapi/async_file_test_helper.cc
new file mode 100644
index 0000000..178efdc
--- /dev/null
+++ b/webkit/fileapi/async_file_test_helper.cc
@@ -0,0 +1,235 @@
+// 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 "base/bind.h"
+#include "base/run_loop.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "webkit/fileapi/async_file_test_helper.h"
+#include "webkit/fileapi/file_system_context.h"
+#include "webkit/fileapi/file_system_mount_point_provider.h"
+#include "webkit/fileapi/file_system_url.h"
+#include "webkit/fileapi/file_system_util.h"
+#include "webkit/quota/quota_manager.h"
+
+namespace fileapi {
+
+namespace {
+
+typedef FileSystemOperation::FileEntryList FileEntryList;
+
+void AssignAndQuit(base::RunLoop* run_loop,
+                   base::PlatformFileError* result_out,
+                   base::PlatformFileError result) {
+  *result_out = result;
+  run_loop->Quit();
+}
+
+base::Callback<void(base::PlatformFileError)>
+AssignAndQuitCallback(base::RunLoop* run_loop,
+                      base::PlatformFileError* result) {
+  return base::Bind(&AssignAndQuit, run_loop, base::Unretained(result));
+}
+
+void GetMetadataCallback(base::RunLoop* run_loop,
+                         base::PlatformFileError* result_out,
+                         base::PlatformFileInfo* file_info_out,
+                         base::FilePath* platform_path_out,
+                         base::PlatformFileError result,
+                         const base::PlatformFileInfo& file_info,
+                         const base::FilePath& platform_path) {
+  *result_out = result;
+  if (file_info_out)
+    *file_info_out = file_info;
+  if (platform_path_out)
+    *platform_path_out = platform_path;
+  run_loop->Quit();
+}
+
+void ReadDirectoryCallback(base::RunLoop* run_loop,
+                           base::PlatformFileError* result_out,
+                           FileEntryList* entries_out,
+                           base::PlatformFileError result,
+                           const FileEntryList& entries,
+                           bool has_more) {
+  *result_out = result;
+  *entries_out = entries;
+  if (result != base::PLATFORM_FILE_OK || !has_more)
+    run_loop->Quit();
+}
+
+void DidGetUsageAndQuota(quota::QuotaStatusCode* status_out,
+                         int64* usage_out,
+                         int64* quota_out,
+                         quota::QuotaStatusCode status,
+                         int64 usage,
+                         int64 quota) {
+  if (status_out)
+    *status_out = status;
+  if (usage_out)
+    *usage_out = usage;
+  if (quota_out)
+    *quota_out = quota;
+}
+
+}  // namespace
+
+const int64 AsyncFileTestHelper::kDontCheckSize = -1;
+
+base::PlatformFileError AsyncFileTestHelper::Copy(
+    FileSystemContext* context,
+    const FileSystemURL& src,
+    const FileSystemURL& dest) {
+  DCHECK(context);
+  FileSystemOperation* operation =
+      context->CreateFileSystemOperation(dest, NULL);
+  EXPECT_TRUE(operation != NULL);
+  base::PlatformFileError result = base::PLATFORM_FILE_ERROR_FAILED;
+  base::RunLoop run_loop;
+  operation->Copy(src, dest, AssignAndQuitCallback(&run_loop, &result));
+  run_loop.Run();
+  return result;
+}
+
+base::PlatformFileError AsyncFileTestHelper::Move(
+    FileSystemContext* context,
+    const FileSystemURL& src,
+    const FileSystemURL& dest) {
+  FileSystemOperation* operation =
+      context->CreateFileSystemOperation(dest, NULL);
+  EXPECT_TRUE(operation != NULL);
+  base::PlatformFileError result = base::PLATFORM_FILE_ERROR_FAILED;
+  base::RunLoop run_loop;
+  operation->Move(src, dest, AssignAndQuitCallback(&run_loop, &result));
+  run_loop.Run();
+  return result;
+}
+
+base::PlatformFileError AsyncFileTestHelper::Remove(
+    FileSystemContext* context,
+    const FileSystemURL& url,
+    bool recursive) {
+  FileSystemOperation* operation =
+      context->CreateFileSystemOperation(url, NULL);
+  EXPECT_TRUE(operation != NULL);
+  base::PlatformFileError result = base::PLATFORM_FILE_ERROR_FAILED;
+  base::RunLoop run_loop;
+  operation->Remove(url, recursive, AssignAndQuitCallback(&run_loop, &result));
+  run_loop.Run();
+  return result;
+}
+
+base::PlatformFileError AsyncFileTestHelper::ReadDirectory(
+    FileSystemContext* context,
+    const FileSystemURL& url,
+    FileEntryList* entries) {
+  DCHECK(entries);
+  entries->clear();
+  base::PlatformFileError result = base::PLATFORM_FILE_ERROR_FAILED;
+  FileSystemOperation* operation =
+      context->CreateFileSystemOperation(url, NULL);
+  EXPECT_TRUE(operation != NULL);
+  base::RunLoop run_loop;
+  operation->ReadDirectory(
+      url, base::Bind(&ReadDirectoryCallback, &run_loop, &result, entries));
+  run_loop.Run();
+  return result;
+}
+
+base::PlatformFileError AsyncFileTestHelper::CreateDirectory(
+    FileSystemContext* context,
+    const FileSystemURL& url) {
+  FileSystemOperation* operation =
+      context->CreateFileSystemOperation(url, NULL);
+  EXPECT_TRUE(operation != NULL);
+  base::PlatformFileError result = base::PLATFORM_FILE_ERROR_FAILED;
+  base::RunLoop run_loop;
+  operation->CreateDirectory(url,
+                             false /* exclusive */,
+                             false /* recursive */,
+                             AssignAndQuitCallback(&run_loop, &result));
+  run_loop.Run();
+  return result;
+}
+
+base::PlatformFileError AsyncFileTestHelper::CreateFile(
+    FileSystemContext* context,
+    const FileSystemURL& url) {
+  FileSystemOperation* operation =
+      context->CreateFileSystemOperation(url, NULL);
+  EXPECT_TRUE(operation != NULL);
+  base::RunLoop run_loop;
+  base::PlatformFileError result = base::PLATFORM_FILE_ERROR_FAILED;
+  operation->CreateFile(url, false /* exclusive */,
+                        AssignAndQuitCallback(&run_loop, &result));
+  run_loop.Run();
+  return result;
+}
+
+base::PlatformFileError AsyncFileTestHelper::TruncateFile(
+    FileSystemContext* context,
+    const FileSystemURL& url,
+    size_t size) {
+  FileSystemOperation* operation =
+      context->CreateFileSystemOperation(url, NULL);
+  EXPECT_TRUE(operation != NULL);
+  base::RunLoop run_loop;
+  base::PlatformFileError result = base::PLATFORM_FILE_ERROR_FAILED;
+  operation->Truncate(url, size,
+                      AssignAndQuitCallback(&run_loop, &result));
+  run_loop.Run();
+  return result;
+}
+
+base::PlatformFileError AsyncFileTestHelper::GetMetadata(
+    FileSystemContext* context,
+    const FileSystemURL& url,
+    base::PlatformFileInfo* file_info,
+    base::FilePath* platform_path) {
+  base::PlatformFileError result = base::PLATFORM_FILE_ERROR_FAILED;
+  base::RunLoop run_loop;
+  FileSystemOperation* operation =
+      context->CreateFileSystemOperation(url, NULL);
+  EXPECT_TRUE(operation != NULL);
+  operation->GetMetadata(url, base::Bind(&GetMetadataCallback,
+                                         &run_loop, &result,
+                                         file_info, platform_path));
+  run_loop.Run();
+  return result;
+}
+
+bool AsyncFileTestHelper::FileExists(
+    FileSystemContext* context,
+    const FileSystemURL& url,
+    int64 expected_size) {
+  base::PlatformFileInfo file_info;
+  base::PlatformFileError result = GetMetadata(context, url, &file_info, NULL);
+  if (result != base::PLATFORM_FILE_OK || file_info.is_directory)
+    return false;
+  return expected_size == kDontCheckSize || file_info.size == expected_size;
+}
+
+bool AsyncFileTestHelper::DirectoryExists(
+    FileSystemContext* context,
+    const FileSystemURL& url) {
+  base::PlatformFileInfo file_info;
+  base::PlatformFileError result = GetMetadata(context, url, &file_info, NULL);
+  return (result == base::PLATFORM_FILE_OK) && file_info.is_directory;
+}
+
+quota::QuotaStatusCode AsyncFileTestHelper::GetUsageAndQuota(
+    quota::QuotaManager* quota_manager,
+    const GURL& origin,
+    FileSystemType type,
+    int64* usage,
+    int64* quota) {
+  quota::QuotaStatusCode status = quota::kQuotaStatusUnknown;
+  quota_manager->GetUsageAndQuota(
+      origin,
+      FileSystemTypeToQuotaStorageType(type),
+      base::Bind(&DidGetUsageAndQuota, &status, usage, quota));
+  MessageLoop::current()->RunUntilIdle();
+  return status;
+}
+
+}  // namespace fileapi
diff --git a/webkit/fileapi/async_file_test_helper.h b/webkit/fileapi/async_file_test_helper.h
new file mode 100644
index 0000000..9955b40
--- /dev/null
+++ b/webkit/fileapi/async_file_test_helper.h
@@ -0,0 +1,90 @@
+// 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.
+
+#ifndef WEBKIT_FILEAPI_ASYNC_FILE_TEST_HELPER_H_
+#define WEBKIT_FILEAPI_ASYNC_FILE_TEST_HELPER_H_
+
+#include "base/basictypes.h"
+#include "webkit/fileapi/file_system_operation.h"
+#include "webkit/fileapi/file_system_types.h"
+#include "webkit/quota/quota_status_code.h"
+
+namespace quota {
+class QuotaManager;
+}
+
+namespace fileapi {
+
+class FileSystemContext;
+class FileSystemURL;
+
+// A helper class to perform async file operations in a synchronous way.
+class AsyncFileTestHelper {
+ public:
+  typedef FileSystemOperation::FileEntryList FileEntryList;
+
+  static const int64 kDontCheckSize;
+
+  // Performs Copy from |src| to |dest| and returns the status code.
+  static base::PlatformFileError Copy(FileSystemContext* context,
+                                      const FileSystemURL& src,
+                                      const FileSystemURL& dest);
+
+  // Performs Move from |src| to |dest| and returns the status code.
+  static base::PlatformFileError Move(FileSystemContext* context,
+                                      const FileSystemURL& src,
+                                      const FileSystemURL& dest);
+
+  // Removes the given |url|.
+  static base::PlatformFileError Remove(FileSystemContext* context,
+                                        const FileSystemURL& url,
+                                        bool recursive);
+
+  // Performs ReadDirectory on |url|.
+  static base::PlatformFileError ReadDirectory(FileSystemContext* context,
+                                               const FileSystemURL& url,
+                                               FileEntryList* entries);
+
+  // Creates a directory at |url|.
+  static base::PlatformFileError CreateDirectory(FileSystemContext* context,
+                                                 const FileSystemURL& url);
+
+  // Creates a file at |url|.
+  static base::PlatformFileError CreateFile(FileSystemContext* context,
+                                            const FileSystemURL& url);
+
+  // Truncates the file |url| to |size|.
+  static base::PlatformFileError TruncateFile(FileSystemContext* context,
+                                              const FileSystemURL& url,
+                                              size_t size);
+
+  // Retrieves PlatformFileInfo for |url| and populates |file_info|.
+  static base::PlatformFileError GetMetadata(FileSystemContext* context,
+                                             const FileSystemURL& url,
+                                             base::PlatformFileInfo* file_info,
+                                             base::FilePath* platform_path);
+
+  // Returns true if a file exists at |url| with |size|. If |size| is
+  // kDontCheckSize it doesn't check the file size (but just check its
+  // existence).
+  static bool FileExists(FileSystemContext* context,
+                         const FileSystemURL& url,
+                         int64 size);
+
+  // Returns true if a directory exists at |url|.
+  static bool DirectoryExists(FileSystemContext* context,
+                              const FileSystemURL& url);
+
+  // Returns usage and quota. It's valid to pass NULL to |usage| and/or |quota|.
+  static quota::QuotaStatusCode GetUsageAndQuota(
+      quota::QuotaManager* quota_manager,
+      const GURL& origin,
+      FileSystemType type,
+      int64* usage,
+      int64* quota);
+};
+
+}  // namespace fileapi
+
+#endif  // WEBKIT_FILEAPI_ASYNC_FILE_TEST_HELPER_H_
diff --git a/webkit/fileapi/local_file_system_cross_operation_unittest.cc b/webkit/fileapi/local_file_system_cross_operation_unittest.cc
index ad1d748..337a6a9 100644
--- a/webkit/fileapi/local_file_system_cross_operation_unittest.cc
+++ b/webkit/fileapi/local_file_system_cross_operation_unittest.cc
@@ -11,15 +11,15 @@
 #include "base/message_loop.h"
 #include "base/run_loop.h"
 #include "base/stl_util.h"
-#include "base/stringprintf.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#include "webkit/fileapi/async_file_test_helper.h"
 #include "webkit/fileapi/external_mount_points.h"
 #include "webkit/fileapi/file_system_context.h"
 #include "webkit/fileapi/file_system_mount_point_provider.h"
+#include "webkit/fileapi/file_system_operation.h"
 #include "webkit/fileapi/file_system_task_runners.h"
 #include "webkit/fileapi/file_system_url.h"
 #include "webkit/fileapi/file_system_util.h"
-#include "webkit/fileapi/local_file_system_operation.h"
 #include "webkit/fileapi/mock_file_system_options.h"
 #include "webkit/fileapi/test_file_set.h"
 #include "webkit/quota/mock_quota_manager.h"
@@ -28,61 +28,8 @@
 
 namespace fileapi {
 
-namespace {
-
-const int64 kDontCheckSize = -1;
 typedef FileSystemOperation::FileEntryList FileEntryList;
 
-void AssignAndQuit(base::RunLoop* run_loop,
-                   base::PlatformFileError* result_out,
-                   base::PlatformFileError result) {
-  *result_out = result;
-  run_loop->Quit();
-}
-
-base::Callback<void(base::PlatformFileError)>
-AssignAndQuitCallback(base::RunLoop* run_loop,
-                      base::PlatformFileError* result) {
-  return base::Bind(&AssignAndQuit, run_loop, base::Unretained(result));
-}
-
-void GetMetadataCallback(base::RunLoop* run_loop,
-                         base::PlatformFileError* result_out,
-                         base::PlatformFileInfo* file_info_out,
-                         base::PlatformFileError result,
-                         const base::PlatformFileInfo& file_info,
-                         const base::FilePath& /* platform_path */) {
-  *result_out = result;
-  *file_info_out = file_info;
-  run_loop->Quit();
-}
-
-void ReadDirectoryCallback(base::RunLoop* run_loop,
-                           base::PlatformFileError* result_out,
-                           FileEntryList* entries_out,
-                           base::PlatformFileError result,
-                           const FileEntryList& entries,
-                           bool has_more) {
-  *result_out = result;
-  *entries_out = entries;
-  if (result != base::PLATFORM_FILE_OK || !has_more)
-    run_loop->Quit();
-}
-
-void DidGetUsageAndQuota(quota::QuotaStatusCode* status_out,
-                         int64* usage_out,
-                         int64* quota_out,
-                         quota::QuotaStatusCode status,
-                         int64 usage,
-                         int64 quota) {
-  if (status_out)
-    *status_out = status;
-  if (usage_out)
-    *usage_out = usage;
-  if (quota_out)
-    *quota_out = quota;
-}
-
 class CrossOperationTestHelper {
  public:
   CrossOperationTestHelper(
@@ -165,26 +112,12 @@ class CrossOperationTestHelper {
 
   base::PlatformFileError Copy(const FileSystemURL& src,
                                const FileSystemURL& dest) {
-    FileSystemOperation* operation =
-        file_system_context_->CreateFileSystemOperation(dest, NULL);
-    EXPECT_TRUE(operation != NULL);
-    base::PlatformFileError result = base::PLATFORM_FILE_ERROR_FAILED;
-    base::RunLoop run_loop;
-    operation->Copy(src, dest, AssignAndQuitCallback(&run_loop, &result));
-    run_loop.Run();
-    return result;
+    return AsyncFileTestHelper::Copy(file_system_context_, src, dest);
   }
 
   base::PlatformFileError Move(const FileSystemURL& src,
                                const FileSystemURL& dest) {
-    FileSystemOperation* operation =
-        file_system_context_->CreateFileSystemOperation(dest, NULL);
-    EXPECT_TRUE(operation != NULL);
-    base::PlatformFileError result = base::PLATFORM_FILE_ERROR_FAILED;
-    base::RunLoop run_loop;
-    operation->Move(src, dest, AssignAndQuitCallback(&run_loop, &result));
-    run_loop.Run();
-    return result;
+    return AsyncFileTestHelper::Move(file_system_context_, src, dest);
   }
 
   base::PlatformFileError SetUpTestCaseFiles(
@@ -243,101 +176,41 @@ class CrossOperationTestHelper {
 
   base::PlatformFileError ReadDirectory(const FileSystemURL& url,
                                         FileEntryList* entries) {
-    entries->clear();
-    base::PlatformFileError result = base::PLATFORM_FILE_ERROR_FAILED;
-    FileSystemOperation* operation =
-        file_system_context_->CreateFileSystemOperation(url, NULL);
-    EXPECT_TRUE(operation != NULL);
-    base::RunLoop run_loop;
-    operation->ReadDirectory(
-        url, base::Bind(&ReadDirectoryCallback, &run_loop, &result, entries));
-    run_loop.Run();
-    return result;
+    return AsyncFileTestHelper::ReadDirectory(
+        file_system_context_, url, entries);
   }
 
   base::PlatformFileError CreateDirectory(const FileSystemURL& url) {
-    FileSystemOperation* operation =
-        file_system_context_->CreateFileSystemOperation(url, NULL);
-    EXPECT_TRUE(operation != NULL);
-    base::PlatformFileError result = base::PLATFORM_FILE_ERROR_FAILED;
-    base::RunLoop run_loop;
-    operation->CreateDirectory(url,
-                               false /* exclusive */,
-                               false /* recursive */,
-                               AssignAndQuitCallback(&run_loop, &result));
-    run_loop.Run();
-    return result;
+    return AsyncFileTestHelper::CreateDirectory(
+        file_system_context_, url);
   }
 
   base::PlatformFileError CreateFile(const FileSystemURL& url, size_t size) {
-    base::PlatformFileError result = base::PLATFORM_FILE_ERROR_FAILED;
-    {
-      FileSystemOperation* operation =
-          file_system_context_->CreateFileSystemOperation(url, NULL);
-      EXPECT_TRUE(operation != NULL);
-      base::RunLoop run_loop;
-      operation->CreateFile(url, false /* exclusive */,
-                            AssignAndQuitCallback(&run_loop, &result));
-      run_loop.Run();
-    }
+    base::PlatformFileError result =
+        AsyncFileTestHelper::CreateFile(file_system_context_, url);
     if (result != base::PLATFORM_FILE_OK)
       return result;
-
-    {
-      FileSystemOperation* operation =
-          file_system_context_->CreateFileSystemOperation(url, NULL);
-      EXPECT_TRUE(operation != NULL);
-      base::RunLoop run_loop;
-      operation->Truncate(url, size,
-                          AssignAndQuitCallback(&run_loop, &result));
-      run_loop.Run();
-    }
-    return result;
+    return AsyncFileTestHelper::TruncateFile(file_system_context_, url, size);
   }
 
   bool FileExists(const FileSystemURL& url, int64 expected_size) {
-    base::PlatformFileError result = base::PLATFORM_FILE_ERROR_FAILED;
-    base::PlatformFileInfo file_info;
-    base::RunLoop run_loop;
-    FileSystemOperation* operation =
-        file_system_context_->CreateFileSystemOperation(url, NULL);
-    EXPECT_TRUE(operation != NULL);
-    operation->GetMetadata(url, base::Bind(&GetMetadataCallback,
-                                           &run_loop, &result, &file_info));
-    run_loop.Run();
-    if (result != base::PLATFORM_FILE_OK || file_info.is_directory)
-      return false;
-    return expected_size == kDontCheckSize || file_info.size == expected_size;
+    return AsyncFileTestHelper::FileExists(
+        file_system_context_, url, expected_size);
   }
 
   bool DirectoryExists(const FileSystemURL& url) {
-    base::PlatformFileError result = base::PLATFORM_FILE_ERROR_FAILED;
-    base::PlatformFileInfo file_info;
-    base::RunLoop run_loop;
-    FileSystemOperation* operation =
-        file_system_context_->CreateFileSystemOperation(url, NULL);
-    EXPECT_TRUE(operation != NULL);
-    operation->GetMetadata(url, base::Bind(&GetMetadataCallback,
-                                           &run_loop, &result, &file_info));
-    run_loop.Run();
-    return (result == base::PLATFORM_FILE_OK) && file_info.is_directory;
+    return AsyncFileTestHelper::DirectoryExists(file_system_context_, url);
   }
 
-  GURL origin() const { return origin_; }
-  FileSystemType src_type() const { return src_type_; }
-  FileSystemType dest_type() const { return dest_type_; }
-
  private:
   void GetUsageAndQuota(FileSystemType type, int64* usage, int64* quota) {
-    quota::QuotaStatusCode status = quota::kQuotaStatusUnknown;
-    quota_manager_->GetUsageAndQuota(
-        origin_,
-        FileSystemTypeToQuotaStorageType(type),
-        base::Bind(&DidGetUsageAndQuota, &status, usage, quota));
-    MessageLoop::current()->RunUntilIdle();
+    quota::QuotaStatusCode status =
+        AsyncFileTestHelper::GetUsageAndQuota(
+            quota_manager_, origin_, type, usage, quota);
     ASSERT_EQ(quota::kQuotaStatusOk, status);
   }
 
+ private:
   base::ScopedTempDir base_;
 
   const GURL origin_;
@@ -352,8 +225,6 @@ class CrossOperationTestHelper {
   DISALLOW_COPY_AND_ASSIGN(CrossOperationTestHelper);
 };
 
-}  // namespace
-
 TEST(LocalFileSystemCrossOperationTest, CopySingleFile) {
   CrossOperationTestHelper helper(GURL("http://foo"),
                                   kFileSystemTypeTemporary,
@@ -402,7 +273,7 @@ TEST(LocalFileSystemCrossOperationTest, MoveSingleFile) {
   ASSERT_EQ(base::PLATFORM_FILE_OK, helper.Move(src, dest));
 
   // Verify.
-  ASSERT_FALSE(helper.FileExists(src, kDontCheckSize));
+  ASSERT_FALSE(helper.FileExists(src, AsyncFileTestHelper::kDontCheckSize));
   ASSERT_TRUE(helper.FileExists(dest, 10));
 
   int64 src_new_usage = helper.GetSourceUsage();
diff --git a/webkit/fileapi/local_file_system_operation_unittest.cc b/webkit/fileapi/local_file_system_operation_unittest.cc
index 8bc9972..6f2bd0d 100644
--- a/webkit/fileapi/local_file_system_operation_unittest.cc
+++ b/webkit/fileapi/local_file_system_operation_unittest.cc
@@ -14,12 +14,12 @@
 #include "googleurl/src/gurl.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "webkit/blob/shareable_file_reference.h"
+#include "webkit/fileapi/async_file_test_helper.h"
 #include "webkit/fileapi/file_system_context.h"
 #include "webkit/fileapi/file_system_file_util.h"
 #include "webkit/fileapi/file_system_mount_point_provider.h"
 #include "webkit/fileapi/file_system_quota_util.h"
 #include "webkit/fileapi/file_system_util.h"
-#include "webkit/fileapi/file_util_helper.h"
 #include "webkit/fileapi/local_file_system_test_helper.h"
 #include "webkit/fileapi/mock_file_change_observer.h"
 #include "webkit/quota/mock_quota_manager.h"
@@ -111,18 +111,15 @@ class LocalFileSystemOperationTest
 
   bool FileExists(const base::FilePath& virtual_path) {
     FileSystemURL url = test_helper_.CreateURL(virtual_path);
-    base::PlatformFileInfo file_info;
-    base::FilePath platform_path;
-    scoped_ptr<FileSystemOperationContext> context(NewContext());
-    base::PlatformFileError error = file_util()->GetFileInfo(
-        context.get(), url, &file_info, &platform_path);
-    return error == base::PLATFORM_FILE_OK && !file_info.is_directory;
+    return AsyncFileTestHelper::FileExists(
+        test_helper_.file_system_context(), url,
+        AsyncFileTestHelper::kDontCheckSize);
   }
 
   bool DirectoryExists(const base::FilePath& virtual_path) {
     FileSystemURL url = test_helper_.CreateURL(virtual_path);
-    scoped_ptr<FileSystemOperationContext> context(NewContext());
-    return FileUtilHelper::DirectoryExists(context.get(), file_util(), url);
+    return AsyncFileTestHelper::DirectoryExists(
+        test_helper_.file_system_context(), url);
   }
 
   base::FilePath CreateUniqueFileInDir(const base::FilePath& virtual_dir_path) {
@@ -209,29 +206,11 @@ class LocalFileSystemOperationTest
     shareable_file_ref_ = shareable_file_ref;
   }
 
-  static void DidGetUsageAndQuota(quota::QuotaStatusCode* status_out,
-                           int64* usage_out,
-                           int64* quota_out,
-                           quota::QuotaStatusCode status,
-                           int64 usage,
-                           int64 quota) {
-    if (status_out)
-      *status_out = status;
-
-    if (usage_out)
-      *usage_out = usage;
-
-    if (quota_out)
-      *quota_out = quota;
-  }
-
   void GetUsageAndQuota(int64* usage, int64* quota) {
-    quota::QuotaStatusCode status = quota::kQuotaStatusUnknown;
-    quota_manager_->GetUsageAndQuota(
-        test_helper_.origin(),
-        test_helper_.storage_type(),
-        base::Bind(&LocalFileSystemOperationTest::DidGetUsageAndQuota,
-                   &status, usage, quota));
+    quota::QuotaStatusCode status =
+        AsyncFileTestHelper::GetUsageAndQuota(
+            quota_manager_, test_helper_.origin(), test_helper_.type(),
+            usage, quota);
     MessageLoop::current()->RunUntilIdle();
     ASSERT_EQ(quota::kQuotaStatusOk, status);
   }
@@ -407,9 +386,7 @@ TEST_F(LocalFileSystemOperationTest, TestMoveSuccessSrcFileAndOverwrite) {
   EXPECT_EQ(1, change_observer()->get_and_reset_remove_file_count());
   EXPECT_TRUE(change_observer()->HasNoChange());
 
-  // Move is considered 'write' access (for both side), and won't be counted
-  // as read access.
-  EXPECT_EQ(0, quota_manager_proxy()->notify_storage_accessed_count());
+  EXPECT_EQ(1, quota_manager_proxy()->notify_storage_accessed_count());
 }
 
 TEST_F(LocalFileSystemOperationTest, TestMoveSuccessSrcFileAndNew) {
@@ -609,7 +586,7 @@ TEST_F(LocalFileSystemOperationTest, TestCopySuccessSrcFileAndOverwrite) {
   MessageLoop::current()->RunUntilIdle();
   EXPECT_EQ(base::PLATFORM_FILE_OK, status());
   EXPECT_TRUE(FileExists(dest_file_path));
-  EXPECT_EQ(1, quota_manager_proxy()->notify_storage_accessed_count());
+  EXPECT_EQ(2, quota_manager_proxy()->notify_storage_accessed_count());
 
   EXPECT_EQ(1, change_observer()->get_and_reset_modify_file_count());
   EXPECT_TRUE(change_observer()->HasNoChange());
@@ -619,14 +596,15 @@ TEST_F(LocalFileSystemOperationTest, TestCopySuccessSrcFileAndNew) {
   base::FilePath src_dir_path(CreateUniqueDir());
   base::FilePath src_file_path(CreateUniqueFileInDir(src_dir_path));
   base::FilePath dest_dir_path(CreateUniqueDir());
-  base::FilePath dest_file_path(dest_dir_path.Append(FILE_PATH_LITERAL("NewFile")));
+  base::FilePath dest_file_path(dest_dir_path.Append(
+      FILE_PATH_LITERAL("NewFile")));
 
   operation()->Copy(URLForPath(src_file_path), URLForPath(dest_file_path),
                     RecordStatusCallback());
   MessageLoop::current()->RunUntilIdle();
   EXPECT_EQ(base::PLATFORM_FILE_OK, status());
   EXPECT_TRUE(FileExists(dest_file_path));
-  EXPECT_EQ(1, quota_manager_proxy()->notify_storage_accessed_count());
+  EXPECT_EQ(2, quota_manager_proxy()->notify_storage_accessed_count());
 
   EXPECT_EQ(1, change_observer()->get_and_reset_create_file_from_count());
   EXPECT_TRUE(change_observer()->HasNoChange());
@@ -645,7 +623,7 @@ TEST_F(LocalFileSystemOperationTest, TestCopySuccessSrcDirAndOverwrite) {
   EXPECT_TRUE(DirectoryExists(dest_dir_path));
   EXPECT_FALSE(DirectoryExists(
       dest_dir_path.Append(VirtualPath::BaseName(src_dir_path))));
-  EXPECT_EQ(1, quota_manager_proxy()->notify_storage_accessed_count());
+  EXPECT_EQ(3, quota_manager_proxy()->notify_storage_accessed_count());
 
   EXPECT_EQ(1, change_observer()->get_and_reset_remove_directory_count());
   EXPECT_EQ(1, change_observer()->get_and_reset_create_directory_count());
@@ -663,7 +641,7 @@ TEST_F(LocalFileSystemOperationTest, TestCopySuccessSrcDirAndNew) {
   MessageLoop::current()->RunUntilIdle();
   EXPECT_EQ(base::PLATFORM_FILE_OK, status());
   EXPECT_TRUE(DirectoryExists(dest_child_dir_path));
-  EXPECT_EQ(1, quota_manager_proxy()->notify_storage_accessed_count());
+  EXPECT_EQ(2, quota_manager_proxy()->notify_storage_accessed_count());
 
   EXPECT_EQ(1, change_observer()->get_and_reset_create_directory_count());
   EXPECT_TRUE(change_observer()->HasNoChange());
diff --git a/webkit/fileapi/local_file_system_quota_unittest.cc b/webkit/fileapi/local_file_system_quota_unittest.cc
index 0e39102..8e0daed 100644
--- a/webkit/fileapi/local_file_system_quota_unittest.cc
+++ b/webkit/fileapi/local_file_system_quota_unittest.cc
@@ -16,9 +16,9 @@
 #include "base/platform_file.h"
 #include "base/string_number_conversions.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#include "webkit/fileapi/async_file_test_helper.h"
 #include "webkit/fileapi/file_system_usage_cache.h"
 #include "webkit/fileapi/file_system_util.h"
-#include "webkit/fileapi/file_util_helper.h"
 #include "webkit/fileapi/local_file_system_operation.h"
 #include "webkit/fileapi/local_file_system_test_helper.h"
 #include "webkit/quota/quota_manager.h"
@@ -58,9 +58,6 @@ class LocalFileSystemQuotaTest
   virtual void SetUp() OVERRIDE;
   virtual void TearDown() OVERRIDE;
 
-  void OnGetUsageAndQuota(
-      quota::QuotaStatusCode status, int64 usage, int64 quota);
-
  protected:
   FileSystemFileUtil* file_util() {
     return test_helper_.file_util();
@@ -93,27 +90,23 @@ class LocalFileSystemQuotaTest
   }
 
   void GetUsageAndQuotaFromQuotaManager() {
-    quota_manager_->GetUsageAndQuota(
-        test_helper_.origin(), test_helper_.storage_type(),
-        base::Bind(&LocalFileSystemQuotaTest::OnGetUsageAndQuota,
-                   weak_factory_.GetWeakPtr()));
+    quota_status_ = AsyncFileTestHelper::GetUsageAndQuota(
+            quota_manager_, test_helper_.origin(), test_helper_.type(),
+            &usage_, &quota_);
     MessageLoop::current()->RunUntilIdle();
   }
 
   bool FileExists(const base::FilePath& virtual_path) {
     FileSystemURL url = test_helper_.CreateURL(virtual_path);
-    base::PlatformFileInfo file_info;
-    base::FilePath platform_path;
-    scoped_ptr<FileSystemOperationContext> context(NewContext());
-    base::PlatformFileError error = file_util()->GetFileInfo(
-        context.get(), url, &file_info, &platform_path);
-    return error == base::PLATFORM_FILE_OK;
+    return AsyncFileTestHelper::FileExists(
+        test_helper_.file_system_context(), url,
+        AsyncFileTestHelper::kDontCheckSize);
   }
 
   bool DirectoryExists(const base::FilePath& virtual_path) {
-    FileSystemURL path = test_helper_.CreateURL(virtual_path);
-    scoped_ptr<FileSystemOperationContext> context(NewContext());
-    return FileUtilHelper::DirectoryExists(context.get(), file_util(), path);
+    FileSystemURL url = test_helper_.CreateURL(virtual_path);
+    return AsyncFileTestHelper::DirectoryExists(
+        test_helper_.file_system_context(), url);
   }
 
   base::FilePath CreateUniqueFileInDir(const base::FilePath& virtual_dir_path) {
@@ -210,13 +203,6 @@ LocalFileSystemOperation* LocalFileSystemQuotaTest::operation() {
   return test_helper_.NewOperation();
 }
 
-void LocalFileSystemQuotaTest::OnGetUsageAndQuota(
-    quota::QuotaStatusCode status, int64 usage, int64 quota) {
-  quota_status_ = status;
-  usage_ = usage;
-  quota_ = quota;
-}
-
 void LocalFileSystemQuotaTest::PrepareFileSet(const base::FilePath& virtual_path) {
   int64 usage = SizeByQuotaUtil();
   child_dir_path_ = CreateUniqueDirInDir(virtual_path);
diff --git a/webkit/fileapi/local_file_system_test_helper.cc b/webkit/fileapi/local_file_system_test_helper.cc
index fe206f1..120f1fe 100644
--- a/webkit/fileapi/local_file_system_test_helper.cc
+++ b/webkit/fileapi/local_file_system_test_helper.cc
@@ -15,7 +15,6 @@
 #include "webkit/fileapi/file_system_url.h"
 #include "webkit/fileapi/file_system_usage_cache.h"
 #include "webkit/fileapi/file_system_util.h"
-#include "webkit/fileapi/file_util_helper.h"
 #include "webkit/fileapi/local_file_system_operation.h"
 #include "webkit/fileapi/mock_file_system_options.h"
 #include "webkit/fileapi/sandbox_mount_point_provider.h"
@@ -124,20 +123,6 @@ FileSystemURL LocalFileSystemTestOriginHelper::CreateURL(const base::FilePath& p
   return file_system_context_->CreateCrackedFileSystemURL(origin_, type_, path);
 }
 
-base::PlatformFileError LocalFileSystemTestOriginHelper::SameFileUtilCopy(
-    FileSystemOperationContext* context,
-    const FileSystemURL& src,
-    const FileSystemURL& dest) const {
-  return FileUtilHelper::Copy(context, file_util(), file_util(), src, dest);
-}
-
-base::PlatformFileError LocalFileSystemTestOriginHelper::SameFileUtilMove(
-    FileSystemOperationContext* context,
-    const FileSystemURL& src,
-    const FileSystemURL& dest) const {
-  return FileUtilHelper::Move(context, file_util(), file_util(), src, dest);
-}
-
 int64 LocalFileSystemTestOriginHelper::GetCachedOriginUsage() const {
   return file_system_context_->GetQuotaUtil(type_)->GetOriginUsageOnFileThread(
       file_system_context_, origin_, type_);
diff --git a/webkit/fileapi/local_file_system_test_helper.h b/webkit/fileapi/local_file_system_test_helper.h
index 6dbebc6..f3f20f3 100644
--- a/webkit/fileapi/local_file_system_test_helper.h
+++ b/webkit/fileapi/local_file_system_test_helper.h
@@ -62,16 +62,6 @@ class LocalFileSystemTestOriginHelper {
     return CreateURL(base::FilePath::FromUTF8Unsafe(utf8));
   }
 
-  // Helper methods for same-FileUtil copy/move.
-  base::PlatformFileError SameFileUtilCopy(
-      FileSystemOperationContext* context,
-      const FileSystemURL& src,
-      const FileSystemURL& dest) const;
-  base::PlatformFileError SameFileUtilMove(
-      FileSystemOperationContext* context,
-      const FileSystemURL& src,
-      const FileSystemURL& dest) const;
-
   // This returns cached usage size returned by QuotaUtil.
   int64 GetCachedOriginUsage() const;
 
diff --git a/webkit/fileapi/local_file_util_unittest.cc b/webkit/fileapi/local_file_util_unittest.cc
index 0d7df03..7582687 100644
--- a/webkit/fileapi/local_file_util_unittest.cc
+++ b/webkit/fileapi/local_file_util_unittest.cc
@@ -12,6 +12,7 @@
 #include "base/sys_string_conversions.h"
 #include "base/utf_string_conversions.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#include "webkit/fileapi/async_file_test_helper.h"
 #include "webkit/fileapi/file_system_context.h"
 #include "webkit/fileapi/file_system_file_util.h"
 #include "webkit/fileapi/file_system_operation_context.h"
@@ -94,6 +95,10 @@ class LocalFileUtilTest : public testing::Test {
     return test_helper_;
   }
 
+  FileSystemContext* file_system_context() {
+    return test_helper_.file_system_context();
+  }
+
  private:
   scoped_ptr<LocalFileUtil> local_file_util_;
   base::ScopedTempDir data_dir_;
@@ -218,15 +223,14 @@ TEST_F(LocalFileUtilTest, CopyFile) {
   EXPECT_TRUE(FileExists(from_file));
   EXPECT_EQ(1020, GetSize(from_file));
 
-  context.reset(NewContext());
   ASSERT_EQ(base::PLATFORM_FILE_OK,
-            test_helper().SameFileUtilCopy(context.get(),
-                                           Path(from_file), Path(to_file1)));
+            AsyncFileTestHelper::Copy(file_system_context(),
+                                      Path(from_file), Path(to_file1)));
 
   context.reset(NewContext());
   ASSERT_EQ(base::PLATFORM_FILE_OK,
-            test_helper().SameFileUtilCopy(context.get(),
-                                           Path(from_file), Path(to_file2)));
+            AsyncFileTestHelper::Copy(file_system_context(),
+                                      Path(from_file), Path(to_file2)));
 
   EXPECT_TRUE(FileExists(from_file));
   EXPECT_EQ(1020, GetSize(from_file));
@@ -261,8 +265,8 @@ TEST_F(LocalFileUtilTest, CopyDirectory) {
 
   context.reset(NewContext());
   ASSERT_EQ(base::PLATFORM_FILE_OK,
-            test_helper().SameFileUtilCopy(context.get(),
-                                           Path(from_dir), Path(to_dir)));
+            AsyncFileTestHelper::Copy(file_system_context(),
+                                      Path(from_dir), Path(to_dir)));
 
   EXPECT_TRUE(DirectoryExists(from_dir));
   EXPECT_TRUE(FileExists(from_file));
@@ -289,8 +293,8 @@ TEST_F(LocalFileUtilTest, MoveFile) {
 
   context.reset(NewContext());
   ASSERT_EQ(base::PLATFORM_FILE_OK,
-            test_helper().SameFileUtilMove(context.get(),
-                                           Path(from_file), Path(to_file)));
+            AsyncFileTestHelper::Move(file_system_context(),
+                                      Path(from_file), Path(to_file)));
 
   EXPECT_FALSE(FileExists(from_file));
   EXPECT_TRUE(FileExists(to_file));
@@ -322,8 +326,8 @@ TEST_F(LocalFileUtilTest, MoveDirectory) {
 
   context.reset(NewContext());
   ASSERT_EQ(base::PLATFORM_FILE_OK,
-            test_helper().SameFileUtilMove(context.get(),
-                                           Path(from_dir), Path(to_dir)));
+            AsyncFileTestHelper::Move(file_system_context(),
+                                      Path(from_dir), Path(to_dir)));
 
   EXPECT_FALSE(DirectoryExists(from_dir));
   EXPECT_TRUE(DirectoryExists(to_dir));
diff --git a/webkit/fileapi/obfuscated_file_util_unittest.cc b/webkit/fileapi/obfuscated_file_util_unittest.cc
index ef0f2bc..5c5159f 100644
--- a/webkit/fileapi/obfuscated_file_util_unittest.cc
+++ b/webkit/fileapi/obfuscated_file_util_unittest.cc
@@ -14,12 +14,12 @@
 #include "base/message_loop.h"
 #include "base/platform_file.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#include "webkit/fileapi/async_file_test_helper.h"
 #include "webkit/fileapi/external_mount_points.h"
 #include "webkit/fileapi/file_system_context.h"
 #include "webkit/fileapi/file_system_operation_context.h"
 #include "webkit/fileapi/file_system_task_runners.h"
 #include "webkit/fileapi/file_system_usage_cache.h"
-#include "webkit/fileapi/file_util_helper.h"
 #include "webkit/fileapi/local_file_system_test_helper.h"
 #include "webkit/fileapi/mock_file_change_observer.h"
 #include "webkit/fileapi/mock_file_system_options.h"
@@ -209,11 +209,10 @@ class ObfuscatedFileUtilTest : public testing::Test {
   }
 
   void GetUsageFromQuotaManager() {
-    quota_manager_->GetUsageAndQuota(
-      origin(), test_helper_.storage_type(),
-      base::Bind(&ObfuscatedFileUtilTest::OnGetUsage,
-                 weak_factory_.GetWeakPtr()));
-    MessageLoop::current()->RunUntilIdle();
+    int64 quota = -1;
+    quota_status_ = AsyncFileTestHelper::GetUsageAndQuota(
+      quota_manager_, origin(), test_helper_.type(),
+      &usage_, &quota);
     EXPECT_EQ(quota::kQuotaStatusOk, quota_status_);
   }
 
@@ -241,8 +240,7 @@ class ObfuscatedFileUtilTest : public testing::Test {
   }
 
   bool DirectoryExists(const FileSystemURL& url) {
-    scoped_ptr<FileSystemOperationContext> context(NewContext(NULL));
-    return FileUtilHelper::DirectoryExists(context.get(), ofu(), url);
+    return AsyncFileTestHelper::DirectoryExists(file_system_context(), url);
   }
 
   int64 usage() const { return usage_; }
@@ -259,12 +257,6 @@ class ObfuscatedFileUtilTest : public testing::Test {
     return test_helper_.CreateURL(path);
   }
 
-  void OnGetUsage(quota::QuotaStatusCode status, int64 usage, int64 unused) {
-    EXPECT_EQ(quota::kQuotaStatusOk, status);
-    quota_status_ = status;
-    usage_ = usage;
-  }
-
   void CheckFileAndCloseHandle(
       const FileSystemURL& url, base::PlatformFile file_handle) {
     scoped_ptr<FileSystemOperationContext> context(NewContext(NULL));
@@ -393,11 +385,10 @@ class ObfuscatedFileUtilTest : public testing::Test {
       std::set<base::FilePath::StringType>* files,
       std::set<base::FilePath::StringType>* directories) {
     scoped_ptr<FileSystemOperationContext> context;
-    context.reset(NewContext(NULL));
     std::vector<base::FileUtilProxy::Entry> entries;
     EXPECT_EQ(base::PLATFORM_FILE_OK,
-              FileUtilHelper::ReadDirectory(
-                  context.get(), ofu(), root_url, &entries));
+              AsyncFileTestHelper::ReadDirectory(
+                  file_system_context(), root_url, &entries));
     EXPECT_EQ(0UL, entries.size());
 
     files->clear();
@@ -440,8 +431,8 @@ class ObfuscatedFileUtilTest : public testing::Test {
     std::vector<base::FileUtilProxy::Entry> entries;
     context.reset(NewContext(NULL));
     EXPECT_EQ(base::PLATFORM_FILE_OK,
-              FileUtilHelper::ReadDirectory(
-                  context.get(), ofu(), root_url, &entries));
+              AsyncFileTestHelper::ReadDirectory(
+                  file_system_context(), root_url, &entries));
     std::vector<base::FileUtilProxy::Entry>::iterator entry_iter;
     EXPECT_EQ(files.size() + directories.size(), entries.size());
     EXPECT_TRUE(change_observer()->HasNoChange());
@@ -635,6 +626,10 @@ class ObfuscatedFileUtilTest : public testing::Test {
     return test_helper_;
   }
 
+  FileSystemContext* file_system_context() {
+    return test_helper_.file_system_context();
+  }
+
  private:
   base::ScopedTempDir data_dir_;
   MessageLoop message_loop_;
@@ -1078,11 +1073,10 @@ TEST_F(ObfuscatedFileUtilTest, TestReadDirectoryOnFile) {
       ofu()->EnsureFileExists(context.get(), url, &created));
   ASSERT_TRUE(created);
 
-  context.reset(NewContext(NULL));
   std::vector<base::FileUtilProxy::Entry> entries;
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_NOT_A_DIRECTORY,
-            FileUtilHelper::ReadDirectory(
-                context.get(), ofu(), url, &entries));
+            AsyncFileTestHelper::ReadDirectory(
+                file_system_context(), url, &entries));
 
   EXPECT_TRUE(ofu()->IsDirectoryEmpty(context.get(), url));
 }
@@ -1396,18 +1390,17 @@ TEST_F(ObfuscatedFileUtilTest, TestEnumerator) {
   FileSystemURL dest_url = CreateURLFromUTF8("destination dir");
 
   EXPECT_FALSE(DirectoryExists(dest_url));
-  context.reset(NewContext(NULL));
   ASSERT_EQ(base::PLATFORM_FILE_OK,
-            test_helper().SameFileUtilCopy(context.get(), src_url, dest_url));
+            AsyncFileTestHelper::Copy(
+                test_helper().file_system_context(), src_url, dest_url));
 
   ValidateTestDirectory(dest_url, files, directories);
   EXPECT_TRUE(DirectoryExists(src_url));
   EXPECT_TRUE(DirectoryExists(dest_url));
-  context.reset(NewContext(NULL));
   recursive = true;
   ASSERT_EQ(base::PLATFORM_FILE_OK,
-            FileUtilHelper::Delete(context.get(), ofu(),
-                                   dest_url, recursive));
+            AsyncFileTestHelper::Remove(
+                file_system_context(), dest_url, recursive));
   EXPECT_FALSE(DirectoryExists(dest_url));
 }
 
@@ -1636,24 +1629,21 @@ TEST_F(ObfuscatedFileUtilTest, TestIncompleteDirectoryReading) {
     EXPECT_TRUE(created);
   }
 
-  context.reset(NewContext(NULL));
   std::vector<base::FileUtilProxy::Entry> entries;
   EXPECT_EQ(base::PLATFORM_FILE_OK,
-            FileUtilHelper::ReadDirectory(
-                context.get(), ofu(), empty_path, &entries));
+            AsyncFileTestHelper::ReadDirectory(
+                file_system_context(), empty_path, &entries));
   EXPECT_EQ(3u, entries.size());
 
-  context.reset(NewContext(NULL));
   base::FilePath local_path;
   EXPECT_EQ(base::PLATFORM_FILE_OK,
             ofu()->GetLocalFilePath(context.get(), kPath[0], &local_path));
   EXPECT_TRUE(file_util::Delete(local_path, false));
 
-  context.reset(NewContext(NULL));
   entries.clear();
   EXPECT_EQ(base::PLATFORM_FILE_OK,
-            FileUtilHelper::ReadDirectory(
-                context.get(), ofu(), empty_path, &entries));
+            AsyncFileTestHelper::ReadDirectory(
+                file_system_context(), empty_path, &entries));
   EXPECT_EQ(ARRAYSIZE_UNSAFE(kPath) - 1, entries.size());
 }
 
@@ -2169,12 +2159,8 @@ TEST_F(ObfuscatedFileUtilTest, TestQuotaOnRemove) {
   ASSERT_EQ(1140, ComputeTotalFileSize());
 
   ASSERT_EQ(base::PLATFORM_FILE_OK,
-            FileUtilHelper::Delete(
-                AllowUsageIncrease(-PathCost(dir) -
-                                   PathCost(dfile1) -
-                                   PathCost(dfile2) -
-                                   1020 - 120)->context(),
-                ofu(), dir, true));
+            AsyncFileTestHelper::Remove(
+                file_system_context(), dir, true /* recursive */));
   ASSERT_EQ(0, ComputeTotalFileSize());
 }