Add new API function: feedbackPrivate.readLogSource

chrome/browser/extensions/api/feedback_private/single_log_source_factory.cc

+// Copyright 2017 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/extensions/api/feedback_private/single_log_source_factory.h"
+
+namespace extensions {
+
+namespace {
+
+const SingleLogSourceFactory::CreateCallback* g_callback = nullptr;
+
+}  // namespace
+
+// static
+system_logs::SingleLogSource* SingleLogSourceFactory::CreateSingleLogSource(
+    system_logs::SingleLogSource::SupportedSource type) {
+  if (g_callback)
+    return g_callback->Run(type);
+
+  return new system_logs::SingleLogSource(type);
+}
+
+// static
+void SingleLogSourceFactory::InitForTesting(
+    const SingleLogSourceFactory::CreateCallback* callback) {
+  g_callback = callback;
+}
+
+}  // namespace extensions