Refactor the about:version code out of about_ui.

chrome/browser/ui/webui/version_handler_chromeos.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/ui/webui/version_handler_chromeos.h"
+
+#include "content/public/browser/web_ui.h"
+
+VersionHandlerChromeOS::VersionHandlerChromeOS() {
+}
+
+VersionHandlerChromeOS::~VersionHandlerChromeOS() {
+}
+
+void VersionHandlerChromeOS::HandleRequestVersionInfo(const ListValue* args) {
+  // Start the asynchronous load of the version.
+  loader_.GetVersion(&consumer_,
+                     base::Bind(&VersionHandlerChromeOS::OnVersion,
+                                base::Unretained(this)),
+                     chromeos::VersionLoader::VERSION_FULL);
+
+  // Parent class takes care of the rest.
+  VersionHandler::HandleRequestVersionInfo(args);
+}
+
+void VersionHandlerChromeOS::OnVersion(chromeos::VersionLoader::Handle handle,
+                                       const std::string& version) {
+  StringValue arg(version);
+  web_ui()->CallJavascriptFunction("returnOsVersion", arg);
+}