Update cached kiosk app crx from usb stick.

chrome/browser/chromeos/app_mode/kiosk_external_update_validator.cc

+// Copyright 2014 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_external_update_validator.h"
+
+#include "base/bind.h"
+#include "base/location.h"
+#include "content/public/browser/browser_thread.h"
+#include "extensions/common/extension.h"
+#include "extensions/common/manifest_constants.h"
+
+namespace chromeos {
+
+KioskExternalUpdateValidator::KioskExternalUpdateValidator(
+    const scoped_refptr<base::SequencedTaskRunner>& backend_task_runner,
+    const std::string& app_id,
+    const base::FilePath& crx_dir,
+    const base::FilePath& crx_unpack_dir,
+    base::WeakPtr<KioskExternalUpdateValidatorDelegate> delegate)
+    : backend_task_runner_(backend_task_runner),
+      app_id_(app_id),
+      crx_dir_(crx_dir),
+      crx_unpack_dir_(crx_unpack_dir),
+      delegate_(delegate) {
+}
+
+KioskExternalUpdateValidator::~KioskExternalUpdateValidator() {
+}
+
+void KioskExternalUpdateValidator::Start() {
+  scoped_refptr<extensions::SandboxedUnpacker> unpacker(
+      new extensions::SandboxedUnpacker(crx_dir_,
+                                        extensions::Manifest::EXTERNAL_PREF,
+                                        extensions::Extension::NO_FLAGS,
+                                        crx_unpack_dir_,
+                                        backend_task_runner_.get(),
+                                        this));
+  if (!backend_task_runner_->PostTask(
+          FROM_HERE,
+          base::Bind(&extensions::SandboxedUnpacker::Start, unpacker.get()))) {
+    NOTREACHED();
+  }
+}
+
+void KioskExternalUpdateValidator::OnUnpackFailure(
+    const base::string16& error_message) {
+  LOG(ERROR) << "Failed to unpack external kiosk crx file: " << app_id_ << " "
+             << error_message;
+  content::BrowserThread::PostTask(
+      content::BrowserThread::UI,
+      FROM_HERE,
+      base::Bind(
+          &KioskExternalUpdateValidatorDelegate::OnExternalUpdateUnpackFailure,
+          delegate_,
+          app_id_));
+}
+
+void KioskExternalUpdateValidator::OnUnpackSuccess(
+    const base::FilePath& temp_dir,
+    const base::FilePath& extension_dir,
+    const base::DictionaryValue* original_manifest,
+    const extensions::Extension* extension,
+    const SkBitmap& install_icon) {
+  DCHECK(app_id_ == extension->id());
+
+  std::string minimum_browser_version;
+  if (!extension->manifest()->GetString(
+          extensions::manifest_keys::kMinimumChromeVersion,
+          &minimum_browser_version)) {
+    LOG(ERROR) << "Can't find minimum browser version for app " << app_id_;

[xiyuan, 2014/08/27 16:17:02]

nit: minimum_browser_version.clear() to make sure we don't use it uninitialized.

[jennyz, 2014/08/28 22:41:06]

Done.

+  }
+
+  content::BrowserThread::PostTask(
+      content::BrowserThread::UI,
+      FROM_HERE,
+      base::Bind(
+          &KioskExternalUpdateValidatorDelegate::OnExtenalUpdateUnpackSuccess,
+          delegate_,
+          app_id_,
+          extension->VersionString(),
+          minimum_browser_version,
+          temp_dir));
+}
+
+}  // namespace chromeos