sync: Re-implement getAllNodes WebUI function

sync/engine/directory_type_debug_info_emitter.cc

Index: sync/engine/directory_type_debug_info_emitter.cc
diff --git a/sync/engine/directory_type_debug_info_emitter.cc b/sync/engine/directory_type_debug_info_emitter.cc
new file mode 100644
index 0000000000000000000000000000000000000000..678878668ba8517de1e526f87c75c276117c1259
--- /dev/null
+++ b/sync/engine/directory_type_debug_info_emitter.cc
@@ -0,0 +1,26 @@
+// Copyright 2014 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 "sync/engine/directory_type_debug_info_emitter.h"
+
+#include "sync/syncable/syncable_read_transaction.h"
+
+namespace syncer {
+
+DirectoryTypeDebugInfoEmitter::DirectoryTypeDebugInfoEmitter(
+    syncable::Directory* directory,
+    syncer::ModelType type)
+    : directory_(directory),
+      type_(type) {}
+
+DirectoryTypeDebugInfoEmitter::~DirectoryTypeDebugInfoEmitter() {}
+
+scoped_ptr<base::ListValue> DirectoryTypeDebugInfoEmitter::GetAllNodes() {
+  syncable::ReadTransaction trans(FROM_HERE, directory_);
+  scoped_ptr<base::ListValue> nodes(
+      directory_->GetNodeDetailsForType(&trans, type_));
+  return nodes.Pass();
+}
+
+}  // namespace syncer