Add extensions code to use common updater in components/update_client/

extensions/browser/updater/update_client_config.cc

+// Copyright 2015 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 "extensions/browser/updater/update_client_config.h"
+
+#include "components/update_client/component_patcher_operation.h"
+#include "components/version_info/version_info.h"
+#include "content/public/browser/browser_context.h"
+#include "content/public/browser/browser_thread.h"
+
+namespace extensions {
+
+UpdateClientConfig::UpdateClientConfig(content::BrowserContext* context)
+    : context_(context) {}
+
+int UpdateClientConfig::InitialDelay() const {
+  return 0;
+}

[Ken Rockot(use gerrit already), 2015/09/25 16:19:19]

nit: missing vertical whitespace between all these definitions

[asargent_no_longer_on_chrome, 2015/09/29 22:59:21]

Done.

+int UpdateClientConfig::NextCheckDelay() const {
+  return 0;
+}
+int UpdateClientConfig::StepDelay() const {
+  return 1;
+}
+int UpdateClientConfig::OnDemandDelay() const {
+  return 1;
+}
+int UpdateClientConfig::UpdateDelay() const {
+  return 1;
+}
+
+std::string UpdateClientConfig::GetOSLongName() const {
+  return version_info::GetOSType();
+}
+
+std::string UpdateClientConfig::ExtraRequestParams() const {
+  return std::string();
+}
+
+net::URLRequestContextGetter* UpdateClientConfig::RequestContext() const {
+  if (!context_)
+    return nullptr;
+  return context_->GetRequestContext();
+}
+
+scoped_refptr<update_client::OutOfProcessPatcher>
+UpdateClientConfig::CreateOutOfProcessPatcher() const {
+  return nullptr;
+}
+
+bool UpdateClientConfig::DeltasEnabled() const {
+  return true;
+}
+
+bool UpdateClientConfig::UseBackgroundDownloader() const {
+  return false;
+}
+
+scoped_refptr<base::SequencedTaskRunner>
+UpdateClientConfig::GetSequencedTaskRunner() const {
+  return content::BrowserThread::GetBlockingPool()
+      ->GetSequencedTaskRunnerWithShutdownBehavior(
+          content::BrowserThread::GetBlockingPool()->GetSequenceToken(),
+          base::SequencedWorkerPool::SKIP_ON_SHUTDOWN);
+}
+
+scoped_refptr<base::SingleThreadTaskRunner>
+UpdateClientConfig::GetSingleThreadTaskRunner() const {
+  return content::BrowserThread::GetMessageLoopProxyForThread(
+      content::BrowserThread::FILE);
+}
+
+UpdateClientConfig::~UpdateClientConfig() {}
+
+}  // namespace extensions