kiosk: Defer app update until platform matches

chrome/browser/chromeos/app_mode/kiosk_app_update_install_gate.cc

Index: chrome/browser/chromeos/app_mode/kiosk_app_update_install_gate.cc
diff --git a/chrome/browser/chromeos/app_mode/kiosk_app_update_install_gate.cc b/chrome/browser/chromeos/app_mode/kiosk_app_update_install_gate.cc
new file mode 100644
index 0000000000000000000000000000000000000000..1e5deefd8ddc19160876f8f65b6cd665671d0092
--- /dev/null
+++ b/chrome/browser/chromeos/app_mode/kiosk_app_update_install_gate.cc
@@ -0,0 +1,37 @@
+// Copyright 2016 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/app_mode/kiosk_app_update_install_gate.h"
+
+#include "chrome/browser/chromeos/app_mode/kiosk_app_manager.h"
+#include "chrome/browser/profiles/profile.h"
+#include "extensions/browser/extension_registry.h"
+#include "extensions/common/extension.h"
+
+namespace chromeos {
+
+KioskAppUpdateInstallGate::KioskAppUpdateInstallGate(Profile* profile)
+    : profile_(profile),
+      registry_(extensions::ExtensionRegistry::Get(profile)) {}
+
+KioskAppUpdateInstallGate::~KioskAppUpdateInstallGate() {}
+
+extensions::InstallGate::Action KioskAppUpdateInstallGate::ShouldDelay(
+    const extensions::Extension* extension,
+    bool install_immediately) {
+  // Install if this is the first install or the required platform version is
+  // compliant with the current platform version.
+  if (!registry_->GetInstalledExtension(extension->id()) ||

[jennyz, 2016/04/19 21:54:28]

For first install case, if the required platform version happens to be not
compliant, will it be helpful if we add a log message for diagnostic purpose?

[xiyuan, 2016/04/19 22:28:45]

Done.

+      KioskAppManager::Get()->IsPlatformCompliantWithApp(extension)) {
+    return INSTALL;
+  }
+
+  // Otherwise, delay install but update the required platform version meta data
+  // to allow update engine to move on to the new platform version.
+  KioskAppManager::Get()->UpdateAppDataFromProfile(extension->id(), profile_,
+                                                   extension);
+  return DELAY;
+}
+
+}  // namespace chromeos