Fixed channel switch when user decides to switch to another channel in

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

Index: chrome/browser/ui/webui/help/version_updater_chromeos.cc
diff --git a/chrome/browser/ui/webui/help/version_updater_chromeos.cc b/chrome/browser/ui/webui/help/version_updater_chromeos.cc
index f0d8179d6ae38294c85ba1c0b9c1d114eb14f32d..4a9151f006a044b4c21dcdfbe6f20dde6b80d355 100644
--- a/chrome/browser/ui/webui/help/version_updater_chromeos.cc
+++ b/chrome/browser/ui/webui/help/version_updater_chromeos.cc
@@ -72,39 +72,6 @@ bool IsAutoUpdateDisabled() {
   return update_disabled;
 }
 
-// Returns whether an update is allowed. If not, it calls the callback with
-// the appropriate status.
-bool EnsureCanUpdate(const VersionUpdater::StatusCallback& callback) {
-  if (IsAutoUpdateDisabled()) {
-    callback.Run(VersionUpdater::FAILED, 0,
-                 l10n_util::GetStringUTF16(IDS_UPGRADE_DISABLED_BY_POLICY));
-    return false;
-  }
-
-  chromeos::NetworkStateHandler* network_state_handler =
-      chromeos::NetworkHandler::Get()->network_state_handler();
-  const chromeos::NetworkState* network =
-      network_state_handler->DefaultNetwork();
-
-  // Don't allow an update if we're currently offline or connected
-  // to a network for which updates are disallowed.
-  NetworkStatus status = GetNetworkStatus(network);
-  if (status == NETWORK_STATUS_OFFLINE) {
-    callback.Run(VersionUpdater::FAILED_OFFLINE, 0,
-                  l10n_util::GetStringUTF16(IDS_UPGRADE_OFFLINE));
-    return false;
-  } else if (status == NETWORK_STATUS_DISALLOWED) {
-    base::string16 message =
-        l10n_util::GetStringFUTF16(
-            IDS_UPGRADE_DISALLOWED,
-            help_utils_chromeos::GetConnectionTypeAsUTF16(network->type()));
-    callback.Run(VersionUpdater::FAILED_CONNECTION_TYPE_DISALLOWED, 0, message);
-    return false;
-  }
-
-  return true;
-}
-
 }  // namespace
 
 VersionUpdater* VersionUpdater::Create() {
@@ -136,12 +103,18 @@ void VersionUpdaterCros::CheckForUpdate(const StatusCallback& callback) {
   if (!update_engine_client->HasObserver(this))
     update_engine_client->AddObserver(this);
 
+  if (update_engine_client->GetLastStatus().status !=
+      UpdateEngineClient::UPDATE_STATUS_IDLE) {
+    check_for_update_when_idle_ = true;
+    return;
+  }
+  check_for_update_when_idle_ = false;
+
   // Make sure that libcros is loaded and OOBE is complete.
   if (!WizardController::default_controller() ||
       chromeos::StartupUtils::IsDeviceRegistered()) {
-    update_engine_client->RequestUpdateCheck(
-        base::Bind(&VersionUpdaterCros::OnUpdateCheck,
-                   weak_ptr_factory_.GetWeakPtr()));
+    update_engine_client->RequestUpdateCheck(base::Bind(
+        &VersionUpdaterCros::OnUpdateCheck, weak_ptr_factory_.GetWeakPtr()));
   }
 }
 
@@ -170,6 +143,7 @@ void VersionUpdaterCros::GetChannel(bool get_current_channel,
 
 VersionUpdaterCros::VersionUpdaterCros()
     : last_operation_(UpdateEngineClient::UPDATE_STATUS_IDLE),
+      check_for_update_when_idle_(false),
       weak_ptr_factory_(this) {
 }
 
@@ -179,6 +153,37 @@ VersionUpdaterCros::~VersionUpdaterCros() {
   update_engine_client->RemoveObserver(this);
 }
 
+bool VersionUpdaterCros::EnsureCanUpdate(const StatusCallback& callback) {
+  if (IsAutoUpdateDisabled()) {
+    callback.Run(VersionUpdater::FAILED, 0,
+                 l10n_util::GetStringUTF16(IDS_UPGRADE_DISABLED_BY_POLICY));
+    return false;
+  }
+
+  chromeos::NetworkStateHandler* network_state_handler =
+      chromeos::NetworkHandler::Get()->network_state_handler();
+  const chromeos::NetworkState* network =
+      network_state_handler->DefaultNetwork();
+
+  // Don't allow an update if we're currently offline or connected
+  // to a network for which updates are disallowed.
+  NetworkStatus status = GetNetworkStatus(network);
+  if (status == NETWORK_STATUS_OFFLINE) {
+    callback.Run(VersionUpdater::FAILED_OFFLINE, 0,
+                  l10n_util::GetStringUTF16(IDS_UPGRADE_OFFLINE));
+    return false;
+  } else if (status == NETWORK_STATUS_DISALLOWED) {
+    base::string16 message =
+        l10n_util::GetStringFUTF16(
+            IDS_UPGRADE_DISALLOWED,
+            help_utils_chromeos::GetConnectionTypeAsUTF16(network->type()));
+    callback.Run(VersionUpdater::FAILED_CONNECTION_TYPE_DISALLOWED, 0, message);
+    return false;
+  }
+
+  return true;
+}
+
 void VersionUpdaterCros::UpdateStatusChanged(
     const UpdateEngineClient::Status& status) {
   Status my_status = UPDATED;
@@ -229,6 +234,11 @@ void VersionUpdaterCros::UpdateStatusChanged(
 
   callback_.Run(my_status, progress, message);
   last_operation_ = status.status;
+
+  if (check_for_update_when_idle_ &&
+      status.status == UpdateEngineClient::UPDATE_STATUS_IDLE) {
+    CheckForUpdate(callback_);
+  }
 }
 
 void VersionUpdaterCros::OnUpdateCheck(