Implement initialization for GDataCache to use in-memory metadata for tests.

chrome/browser/chromeos/gdata/gdata_cache_metadata.cc

 // Copyright (c) 2012 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 "chrome/browser/chromeos/gdata/gdata_cache_metadata.h"
 
 #include <leveldb/db.h>
 
 #include "base/file_util.h"
 #include "base/sequenced_task_runner.h"
@@ skipping 578 matching lines @@
   AssertOnSequencedWorkerPool();
 }
 
 // static
 scoped_ptr<GDataCacheMetadata> GDataCacheMetadata::CreateGDataCacheMetadata(
     base::SequencedTaskRunner* blocking_task_runner) {
   return scoped_ptr<GDataCacheMetadata>(
       new GDataCacheMetadataDB(blocking_task_runner));
 }
 
+// static
+scoped_ptr<GDataCacheMetadata>
+GDataCacheMetadata::CreateGDataCacheMetadataForTesting(
+    base::SequencedTaskRunner* blocking_task_runner) {
+  return scoped_ptr<GDataCacheMetadata>(
+      new GDataCacheMetadataMap(blocking_task_runner));

[satorux1, 2012/08/08 15:53:57]

Could you rename GDataCacheMetadataMap to FakeGDataCacheMetadata, as suggested
before?

[Haruki Sato, 2012/08/09 02:04:02]

Done.

+}
+
 void GDataCacheMetadata::AssertOnSequencedWorkerPool() {
   DCHECK(!blocking_task_runner_ ||
          blocking_task_runner_->RunsTasksOnCurrentThread());
 }
 
 }  // namespace gdata