(For-try) Divide recursive Copy/Move into multiple async tasks

webkit/fileapi/isolated_file_util_unittest.cc

Index: webkit/fileapi/isolated_file_util_unittest.cc
diff --git a/webkit/fileapi/isolated_file_util_unittest.cc b/webkit/fileapi/isolated_file_util_unittest.cc
index 9a5b48e6215a63b8acb57e5ae653225361921b7e..2ab7e71ef302d8f43a603314821432282dcae4c3 100644
--- a/webkit/fileapi/isolated_file_util_unittest.cc
+++ b/webkit/fileapi/isolated_file_util_unittest.cc
@@ -50,6 +50,14 @@ FilePath GetTopLevelPath(const FilePath& path) {
   return FilePath(components[0]);
 }
 
+bool IsDirectoryEmpty(FileSystemOperationContext* context,
+                      FileSystemFileUtil* file_util,
+                      const FileSystemURL& url) {
+  scoped_ptr<FileSystemFileUtil::AbstractFileEnumerator> file_enum =
+      file_util->CreateFileEnumerator(context, url, false /* recursive */);
+  return file_enum->Next().empty();
+}
+
 }  // namespace
 
 // TODO(kinuko): we should have separate tests for DraggedFileUtil and
@@ -193,8 +201,8 @@ class IsolatedFileUtilTest : public testing::Test {
       if (file_enum2->IsDirectory()) {
         FileSystemOperationContext context1(file_system_context());
         FileSystemOperationContext context2(file_system_context());
-        EXPECT_EQ(file_util1->IsDirectoryEmpty(&context1, url1),
-                  file_util2->IsDirectoryEmpty(&context2, url2));
+        EXPECT_EQ(IsDirectoryEmpty(&context1, file_util1, url1),
+                  IsDirectoryEmpty(&context2, file_util2, url2));
         continue;
       }
       EXPECT_TRUE(file_set1.find(relative) != file_set1.end());