Refactor OAuth2TokenService to have profile- and device-based implementations.

chrome/browser/chromeos/settings/device_oauth2_token_service_factory.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/settings/device_oauth2_token_service_factory.h"
+
+#include "base/lazy_instance.h"
+#include "chrome/browser/browser_process.h"
+#include "content/public/browser/browser_thread.h"
+
+namespace chromeos {
+
+static base::LazyInstance<DeviceOAuth2TokenServiceFactory>
+    g_device_oauth2_token_service_factory_ = LAZY_INSTANCE_INITIALIZER;
+
+DeviceOAuth2TokenServiceFactory::DeviceOAuth2TokenServiceFactory() {
+}
+
+DeviceOAuth2TokenServiceFactory::~DeviceOAuth2TokenServiceFactory() {
+}
+
+// static
+DeviceOAuth2TokenService* DeviceOAuth2TokenServiceFactory::Get() {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
+  DeviceOAuth2TokenServiceFactory factory =
+      g_device_oauth2_token_service_factory_.Get();
+
+  return factory.GetImpl();

[Mattias Nissler (ping if slow), 2013/04/03 11:33:16]

It seems like a simpler implementation could be to avoid creating a
DeviceOAuth2TokenServiceFactory instances at all and just keeping a global
g_device_oauth2_token_service_ pointer that Get()/Initialize()/Shutdown()
maintains.

[David Roche, 2013/04/03 16:34:09]

Done.

+}
+
+DeviceOAuth2TokenService* DeviceOAuth2TokenServiceFactory::GetImpl() {
+  return device_oauth2_token_service_.get();
+}
+
+// static
+void DeviceOAuth2TokenServiceFactory::Initialize() {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
+  g_device_oauth2_token_service_factory_.Get().InitializeImpl();
+}
+
+void DeviceOAuth2TokenServiceFactory::InitializeImpl() {
+  DCHECK(!device_oauth2_token_service_);
+  device_oauth2_token_service_.reset(
+      new DeviceOAuth2TokenService(
+          g_browser_process->system_request_context(),
+          g_browser_process->local_state()));
+}
+
+// static
+void DeviceOAuth2TokenServiceFactory::Shutdown() {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
+  g_device_oauth2_token_service_factory_.Get().ShutdownImpl();
+}
+
+void DeviceOAuth2TokenServiceFactory::ShutdownImpl() {
+  if (device_oauth2_token_service_.get()) {

[Mattias Nissler (ping if slow), 2013/04/03 11:33:16]

nit: no need for curlies here.

[David Roche, 2013/04/03 16:34:09]

Done.

+    device_oauth2_token_service_->Shutdown();

[Mattias Nissler (ping if slow), 2013/04/03 11:33:16]

Shouldn't we just destroy the object here?

[David Roche, 2013/04/03 16:34:09]

Done.

+  }
+}
+
+}  // namespace chromeos