Universial component install for chrome os.

chrome/browser/component_updater/cros_component_installer.h

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.

[waffles, 2017/03/01 18:49:20]

no (c) after Copyright, and use 2017. See
https://chromium.googlesource.com/chromium/src/+/master/styleguide/c++/c++.md...

[xiaochu, 2017/03/02 01:50:05]

Done.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+#ifndef CHROME_BROWSER_COMPONENT_UPDATER_CROS_COMPONENT_INSTALLER_H_
+#define CHROME_BROWSER_COMPONENT_UPDATER_CROS_COMPONENT_INSTALLER_H_
+
+#include "base/base_paths.h"
+#include "base/bind.h"
+#include "base/command_line.h"
+#include "base/files/file_enumerator.h"
+#include "base/files/file_path.h"
+#include "base/files/file_util.h"
+#include "base/json/json_file_value_serializer.h"
+#include "base/json/json_reader.h"
+#include "base/logging.h"
+#include "base/memory/ptr_util.h"
+#include "base/path_service.h"
+#include "base/stl_util.h"
+#include "base/strings/string_util.h"
+#include "base/strings/stringprintf.h"
+#include "base/strings/utf_string_conversions.h"
+#include "base/version.h"
+#include "build/build_config.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/component_updater/component_installer_errors.h"
+#include "chrome/browser/component_updater/cros_component_installer.h"
+#include "chrome/browser/plugins/plugin_prefs.h"
+#include "chrome/common/chrome_constants.h"
+#include "chrome/common/chrome_content_client.h"
+#include "chrome/common/chrome_paths.h"
+#include "chrome/common/chrome_switches.h"
+#include "components/component_updater/component_updater_service.h"
+#include "components/component_updater/default_component_installer.h"
+#include "components/update_client/update_client.h"
+#include "components/update_client/update_client_errors.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/plugin_service.h"
+#include "content/public/common/content_constants.h"
+#include "crypto/sha2.h"
+
+#if defined(OS_CHROMEOS)
+#include "chrome/browser/chromeos/settings/cros_settings.h"
+#include "chrome/browser/ui/ash/system_tray_client.h"
+#include "chrome/common/chrome_features.h"
+#include "chromeos/dbus/dbus_method_call_status.h"
+#include "chromeos/dbus/dbus_thread_manager.h"
+#include "chromeos/dbus/image_loader_client.h"
+#include "content/public/browser/browser_thread.h"
+#elif defined(OS_LINUX)
+#include "chrome/common/component_flash_hint_file_linux.h"

[waffles, 2017/03/01 18:49:20]

Do you really need this? I'm also unsure about many of the other headers - can
we remove some, or move the includes into the cc file?

[xiaochu, 2017/03/02 01:50:05]

Done.

+#endif  // defined(OS_CHROMEOS)

[waffles, 2017/03/01 18:49:20]

Do you want to consider having the entire CrOSComponentInstallerTraits object
conditionally compiled?

[xiaochu, 2017/03/02 01:50:05]

Done.

+
+namespace component_updater {
+
+static const char componentConfigReaderFilepathstr[] =
+    "/etc/cros_component.config";
+static std::unique_ptr<base::Value> componentConfigReaderRoot = nullptr;

[waffles, 2017/03/01 18:49:20]

Not sure this is allowed. See
https://google.github.io/styleguide/cppguide.html#Static_and_Global_Variables

In any case I don't think you need the = nullptr.

[xiaochu, 2017/03/02 01:50:05]

Done.

+
+class ComponentUpdateService;
+
+struct ComponentConfig {
+  std::string name;
+  std::string dir;
+  std::string sha2hashstr;
+};
+class CrOSComponentInstallerTraits : public ComponentInstallerTraits {
+ public:
+  CrOSComponentInstallerTraits(std::string dir_name,
+                               std::string name,
+                               std::string sha2HashStr);
+  ~CrOSComponentInstallerTraits() override {}
+
+ private:
+  // The following methods override ComponentInstallerTraits.
+  bool SupportsGroupPolicyEnabledComponentUpdates() const override;
+  bool RequiresNetworkEncryption() const override;
+  update_client::CrxInstaller::Result OnCustomInstall(
+      const base::DictionaryValue& manifest,
+      const base::FilePath& install_dir) override;
+  bool VerifyInstallation(const base::DictionaryValue& manifest,
+                          const base::FilePath& install_dir) const override;
+  void ComponentReady(const base::Version& version,
+                      const base::FilePath& path,
+                      std::unique_ptr<base::DictionaryValue> manifest) override;
+  base::FilePath GetRelativeInstallDir() const override;
+  void GetHash(std::vector<uint8_t>* hash) const override;
+  std::string GetName() const override;
+  update_client::InstallerAttributes GetInstallerAttributes() const override;
+  std::vector<std::string> GetMimeTypes() const override;
+  std::string dir_name;
+  std::string name;
+  uint8_t kSha2Hash_[crypto::kSHA256Length] = {};
+
+  DISALLOW_COPY_AND_ASSIGN(CrOSComponentInstallerTraits);
+};
+
+// Register a CrOS component.
+// It must be called on UI thread.
+// It also assumes LoadCrOSConfig has finished loading configuration. Otherwise,
+// it does nothing.
+bool RegisterCrOSComponent(ComponentUpdateService* cus,
+                           const std::string& name);
+// Load configuration into memory (only once).
+// It is an asynchronous call issued at browser launch.
+void LoadCrOSConfig(ComponentUpdateService* cus);
+
+}  // namespace component_updater
+
+#endif  // CHROME_BROWSER_COMPONENT_UPDATER_CROS_COMPONENT_INSTALLER_H_