Fix AsyncFileTestHelper::ReadDirectory to handle has_more correctly

content/public/test/async_file_test_helper.cc

Index: content/public/test/async_file_test_helper.cc
diff --git a/content/public/test/async_file_test_helper.cc b/content/public/test/async_file_test_helper.cc
index 2da0bf8d1153c8f480cd6a4302c925534eb39628..26a25736f69bf3ea32099d5de1701d3f7a4ec168 100644
--- a/content/public/test/async_file_test_helper.cc
+++ b/content/public/test/async_file_test_helper.cc
@@ -19,6 +19,8 @@ namespace content {
 
 typedef fileapi::FileSystemOperation::FileEntryList FileEntryList;
 
+namespace {
+
 void AssignAndQuit(base::RunLoop* run_loop,
                    base::File::Error* result_out,
                    base::File::Error result) {
@@ -65,7 +67,7 @@ void ReadDirectoryCallback(base::RunLoop* run_loop,
                            const FileEntryList& entries,
                            bool has_more) {
   *result_out = result;
-  *entries_out = entries;
+  entries_out->insert(entries_out->end(), entries.begin(), entries.end());
   if (result != base::File::FILE_OK || !has_more)
     run_loop->Quit();
 }
@@ -84,6 +86,8 @@ void DidGetUsageAndQuota(quota::QuotaStatusCode* status_out,
     *quota_out = quota;
 }
 
+}  // namespace
+
 const int64 AsyncFileTestHelper::kDontCheckSize = -1;
 
 base::File::Error AsyncFileTestHelper::Copy(