Help: Implement version updating on Win.

chrome/browser/ui/webui/help/version_updater_win.cc

Index: chrome/browser/ui/webui/help/version_updater_win.cc
diff --git a/chrome/browser/ui/webui/help/version_updater_win.cc b/chrome/browser/ui/webui/help/version_updater_win.cc
new file mode 100644
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+++ b/chrome/browser/ui/webui/help/version_updater_win.cc
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+// Use of this source code is governed by a BSD-style license that can be
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// found in the LICENSE file.
+
+#include "chrome/browser/ui/webui/help/version_updater_win.h"
+
+#include "base/i18n/rtl.h"
+#include "base/logging.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/string16.h"
+#include "base/threading/thread_restrictions.h"
+#include "base/version.h"
+#include "base/win/windows_version.h"
+#include "base/win/win_util.h"
+#include "chrome/browser/ui/browser_list.h"
+#include "chrome/common/chrome_version_info.h"
+#include "chrome/installer/util/browser_distribution.h"
+#include "chrome/installer/util/install_util.h"
+#include "content/public/browser/user_metrics.h"
+#include "grit/chromium_strings.h"
+#include "grit/generated_resources.h"
+#include "ui/base/l10n/l10n_util.h"
+
+using content::UserMetricsAction;
+
+VersionUpdater* VersionUpdater::Create() {
+  return new VersionUpdaterWin;
+}
+
+VersionUpdaterWin::VersionUpdaterWin()
+    : google_updater_(new GoogleUpdate()) {
+  google_updater_->set_status_listener(this);
+}
+
+VersionUpdaterWin::~VersionUpdaterWin() {
+  // The Google Updater will hold a pointer to us until it reports status, so we
+  // need to let it know that we will no longer be listening.
+  if (google_updater_)
+    google_updater_->set_status_listener(NULL);
+}
+
+void VersionUpdaterWin::CheckForUpdate(const StatusCallback& callback) {
+  callback_ = callback;
+
+  // On-demand updates for Chrome don't work in Vista RTM when UAC is turned
+  // off. So, in this case we just want the About box to not mention
+  // on-demand updates. Silent updates (in the background) should still
+  // work as before - enabling UAC or installing the latest service pack
+  // for Vista is another option.
+  if (!(base::win::GetVersion() == base::win::VERSION_VISTA &&
+        (base::win::OSInfo::GetInstance()->service_pack().major == 0) &&
+        !base::win::UserAccountControlIsEnabled())) {
+    UpdateStatus(UPGRADE_CHECK_STARTED, GOOGLE_UPDATE_NO_ERROR, string16());
+    google_updater_->CheckForUpdate(false,  // Don't upgrade yet.
+                                    NULL);  // No window widget.
+  }
+}
+
+void VersionUpdaterWin::RelaunchBrowser() const {
+  BrowserList::AttemptRestart();
+}
+
+void VersionUpdaterWin::OnReportResults(
+    GoogleUpdateUpgradeResult result, GoogleUpdateErrorCode error_code,
+    const string16& error_message, const string16& version) {
+  // Drop the last reference to the object so that it gets cleaned up here.
+  google_updater_ = NULL;
+  UpdateStatus(result, error_code, error_message);
+}
+
+void VersionUpdaterWin::UpdateStatus(GoogleUpdateUpgradeResult result,
+                                     GoogleUpdateErrorCode error_code,
+                                     const string16& error_message) {
+#if !defined(GOOGLE_CHROME_BUILD)
+  // For Chromium builds it would show an error message.
+  // But it looks weird because in fact there is no error,
+  // just the update server is not available for non-official builds.
+  return;
+#endif
+
+  Status status = UPDATED;
+  string16 message;
+
+  switch (result) {
+    case UPGRADE_CHECK_STARTED: {
+      content::RecordAction(UserMetricsAction("UpgradeCheck_Started"));
+      status = CHECKING;
+      break;
+    }
+    case UPGRADE_STARTED: {
+      content::RecordAction(UserMetricsAction("Upgrade_Started"));
+      status = UPDATING;
+      break;
+    }
+    case UPGRADE_IS_AVAILABLE: {
+      content::RecordAction(
+          UserMetricsAction("UpgradeCheck_UpgradeIsAvailable"));
+      DCHECK(!google_updater_);  // Should have been nulled out already.
+      google_updater_ = new GoogleUpdate();
+      google_updater_->set_status_listener(this);
+      UpdateStatus(UPGRADE_STARTED, GOOGLE_UPDATE_NO_ERROR, string16());
+      google_updater_->CheckForUpdate(true,   // Upgrade now.
+                                      NULL);  // No window widget.
+      return;
+    }
+    case UPGRADE_ALREADY_UP_TO_DATE: {
+      // Google Update reported that Chrome is up-to-date. Now make sure that we
+      // are running the latest version and if not, notify the user by falling
+      // into the next case of UPGRADE_SUCCESSFUL.
+      //
+      // The extra version check is necessary on Windows because the application
+      // may be already up to date on disk though the running app is still
+      // out of date. Chrome OS doesn't quite have this issue since the
+      // OS/App are updated together. If a newer version of the OS has been
+      // staged then UPGRADE_SUCESSFUL will be returned.
+      BrowserDistribution* dist = BrowserDistribution::GetDistribution();
+      base::ThreadRestrictions::ScopedAllowIO allow_io;
+      chrome::VersionInfo version_info;
+      scoped_ptr<Version> installed_version(
+          InstallUtil::GetChromeVersion(dist, false));
+      if (!installed_version.get()) {
+        // User-level Chrome is not installed, check system-level.
+        installed_version.reset(InstallUtil::GetChromeVersion(dist, true));
+      }
+      scoped_ptr<Version> running_version(
+          Version::GetVersionFromString(version_info.Version()));
+      if (!installed_version.get() ||
+          (installed_version->CompareTo(*running_version) <= 0)) {
+        content::RecordAction(
+            UserMetricsAction("UpgradeCheck_AlreadyUpToDate"));
+        status = UPDATED;
+        break;
+      }
+
+      content::RecordAction(UserMetricsAction("UpgradeCheck_AlreadyUpgraded"));
+      status = NEARLY_UPDATED;
+      break;
+    }
+    case UPGRADE_SUCCESSFUL: {
+      content::RecordAction(UserMetricsAction("UpgradeCheck_Upgraded"));
+      status = NEARLY_UPDATED;
+      break;
+    }
+    case UPGRADE_ERROR: {
+      content::RecordAction(UserMetricsAction("UpgradeCheck_Error"));
+      status = FAILED;
+      if (!error_message.empty()) {
+        message =
+            l10n_util::GetStringFUTF16(IDS_ABOUT_BOX_ERROR_DURING_UPDATE_CHECK,
+                                       error_message);
+      }
+      if (error_code != GOOGLE_UPDATE_DISABLED_BY_POLICY) {
+        message =
+            l10n_util::GetStringFUTF16Int(IDS_UPGRADE_ERROR, error_code);
+      } else {
+        message =
+            l10n_util::GetStringUTF16(IDS_UPGRADE_DISABLED_BY_POLICY);
+      }
+      break;
+    }
+  }
+
+  callback_.Run(status, 0, message);
+}