Cleanup: Introduce AsyncFileTestHelper for testing with async file/quota operations

webkit/fileapi/local_file_system_test_helper.cc

Index: webkit/fileapi/local_file_system_test_helper.cc
diff --git a/webkit/fileapi/local_file_system_test_helper.cc b/webkit/fileapi/local_file_system_test_helper.cc
index fe206f1641fe6f5984a5e824a116c32961e3fea6..120f1fe0335479e148900eff0d312ee96942a21b 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_);