Fetch ARC Kiosk app name and icon from Android side.

chrome/browser/chromeos/app_mode/kiosk_app_data_base.cc

+// Copyright 2017 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_data_base.h"
+
+#include <utility>
+
+#include "base/files/file_util.h"
+#include "base/memory/ptr_util.h"
+#include "base/task_scheduler/post_task.h"
+#include "base/threading/sequenced_worker_pool.h"
+#include "chrome/browser/browser_process.h"
+#include "components/prefs/pref_service.h"
+#include "components/prefs/scoped_user_pref_update.h"
+#include "content/public/browser/browser_thread.h"
+#include "ui/gfx/codec/png_codec.h"
+
+using content::BrowserThread;
+
+namespace chromeos {
+
+namespace {
+
+// Keys for local state data.
+constexpr char kKeyName[] = "name";
+constexpr char kKeyIcon[] = "icon";
+
+// Icon file extension.
+constexpr char kIconFileExtension[] = ".png";
+
+// Save |raw_icon| for given |app_id|.
+void SaveIconToLocalOnBlockingPool(const base::FilePath& icon_path,
+                                   std::vector<unsigned char> image_data) {
+  DCHECK(BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
+
+  const base::FilePath dir = icon_path.DirName();
+  if (!base::PathExists(dir) || !base::CreateDirectory(dir)) {

[khmel, 2017/03/31 14:37:13]

Would it be !base::PathExists(dir) && !base::CreateDirectory(dir)?

[Sergey Poromov, 2017/03/31 15:08:56]

Sure! Thank you! My bad...

[xiyuan, 2017/03/31 15:10:02]

Good catch. It should be &&.

+    LOG(ERROR) << "Failed to create directory to store kiosk icons";
+    return;
+  }
+
+  int wrote = base::WriteFile(

[khmel, 2017/03/31 14:37:13]

tiny nit: here ant at L102, L107 you may use const.

[Sergey Poromov, 2017/03/31 15:08:56]

Done.

+      icon_path, reinterpret_cast<char*>(image_data.data()), image_data.size());
+  if (wrote != static_cast<int>(image_data.size())) {
+    LOG(ERROR) << "Failed to write kiosk icon file";
+  }
+}
+
+}  // namespace
+
+// static
+const char KioskAppDataBase::kKeyApps[] = "apps";
+
+KioskAppDataBase::KioskAppDataBase(const std::string& dictionary_name,
+                                   const std::string& app_id,
+                                   const AccountId& account_id)
+    : dictionary_name_(dictionary_name),
+      app_id_(app_id),
+      account_id_(account_id) {}
+
+KioskAppDataBase::~KioskAppDataBase() = default;
+
+void KioskAppDataBase::SaveToDictionary(DictionaryPrefUpdate& dict_update) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  const std::string app_key = std::string(kKeyApps) + '.' + app_id_;
+  const std::string name_key = app_key + '.' + kKeyName;
+  const std::string icon_path_key = app_key + '.' + kKeyIcon;
+
+  dict_update->SetString(name_key, name_);
+  dict_update->SetString(icon_path_key, icon_path_.value());
+}
+
+bool KioskAppDataBase::LoadFromDictionary(const base::DictionaryValue* dict) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  const std::string app_key =
+      std::string(KioskAppDataBase::kKeyApps) + '.' + app_id_;
+  const std::string name_key = app_key + '.' + kKeyName;
+  const std::string icon_path_key = app_key + '.' + kKeyIcon;
+
+  std::string icon_path_string;
+  if (!dict->GetString(name_key, &name_) ||
+      !dict->GetString(icon_path_key, &icon_path_string)) {
+    return false;
+  }
+  icon_path_ = base::FilePath(icon_path_string);
+
+  kiosk_app_icon_loader_ = base::MakeUnique<KioskAppIconLoader>(this);
+  kiosk_app_icon_loader_->Start(icon_path_);
+  return true;
+}
+
+void KioskAppDataBase::SaveIcon(const SkBitmap& icon,
+                                const base::FilePath& cache_dir) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  std::vector<unsigned char> image_data;
+  if (!gfx::PNGCodec::EncodeBGRASkBitmap(icon, false, &image_data)) {
+    LOG(ERROR) << "Failed to encode kiosk icon";
+    return;
+  }
+
+  base::FilePath icon_path =
+      cache_dir.AppendASCII(app_id_).AddExtension(kIconFileExtension);
+  BrowserThread::GetBlockingPool()->PostTask(
+      FROM_HERE, base::Bind(&SaveIconToLocalOnBlockingPool, icon_path,
+                            base::Passed(std::move(image_data))));
+
+  icon_path_ = icon_path;
+}
+
+void KioskAppDataBase::ClearCache() {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  PrefService* local_state = g_browser_process->local_state();
+
+  DictionaryPrefUpdate dict_update(local_state, dictionary_name());
+
+  std::string app_key = std::string(KioskAppDataBase::kKeyApps) + '.' + app_id_;
+  dict_update->Remove(app_key, nullptr);
+
+  if (!icon_path_.empty()) {
+    base::PostTaskWithTraits(
+        FROM_HERE,
+        base::TaskTraits().MayBlock().WithPriority(
+            base::TaskPriority::BACKGROUND),
+        base::Bind(base::IgnoreResult(&base::DeleteFile), icon_path_, false));
+  }
+}
+
+}  // namespace chromeos