feat: preliminary support for //extensions (#17440)

shell/browser/extensions/atom_extension_system.h

@@ -0,0 +1,119 @@
+// 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.
+
+#ifndef SHELL_BROWSER_EXTENSIONS_ATOM_EXTENSION_SYSTEM_H_
+#define SHELL_BROWSER_EXTENSIONS_ATOM_EXTENSION_SYSTEM_H_
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "base/compiler_specific.h"
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/weak_ptr.h"
+#include "base/one_shot_event.h"
+#include "extensions/browser/extension_system.h"
+
+namespace base {
+class FilePath;
+}
+
+namespace content {
+class BrowserContext;
+}
+
+namespace extensions {
+
+class AtomExtensionLoader;
+class ValueStoreFactory;
+
+// A simplified version of ExtensionSystem for app_shell. Allows
+// app_shell to skip initialization of services it doesn't need.
+class AtomExtensionSystem : public ExtensionSystem {
+ public:
+  using InstallUpdateCallback = ExtensionSystem::InstallUpdateCallback;
+  explicit AtomExtensionSystem(content::BrowserContext* browser_context);
+  ~AtomExtensionSystem() override;
+
+  // Loads an unpacked extension from a directory. Returns the extension on
+  // success, or nullptr otherwise.
+  const Extension* LoadExtension(const base::FilePath& extension_dir);
+
+  // Loads an unpacked platform app from a directory. Returns the extension on
+  // success, or nullptr otherwise.
+  // Currently this just calls LoadExtension, as apps are not loaded differently
+  // than other extensions. Use LaunchApp() to actually launch the loaded app.
+  const Extension* LoadApp(const base::FilePath& app_dir);
+
+  // Finish initialization for the shell extension system.
+  void FinishInitialization();
+
+  // Reloads the extension with id |extension_id|.
+  void ReloadExtension(const ExtensionId& extension_id);
+
+  // KeyedService implementation:
+  void Shutdown() override;
+
+  // ExtensionSystem implementation:
+  void InitForRegularProfile(bool extensions_enabled) override;
+  void InitForIncognitoProfile() override;
+  ExtensionService* extension_service() override;
+  RuntimeData* runtime_data() override;
+  ManagementPolicy* management_policy() override;
+  ServiceWorkerManager* service_worker_manager() override;
+  SharedUserScriptMaster* shared_user_script_master() override;
+  StateStore* state_store() override;
+  StateStore* rules_store() override;
+  scoped_refptr<ValueStoreFactory> store_factory() override;
+  InfoMap* info_map() override;
+  QuotaService* quota_service() override;
+  AppSorting* app_sorting() override;
+  void RegisterExtensionWithRequestContexts(
+      const Extension* extension,
+      const base::Closure& callback) override;
+  void UnregisterExtensionWithRequestContexts(
+      const std::string& extension_id,
+      const UnloadedExtensionReason reason) override;
+  const base::OneShotEvent& ready() const override;
+  ContentVerifier* content_verifier() override;
+  std::unique_ptr<ExtensionSet> GetDependentExtensions(
+      const Extension* extension) override;
+  void InstallUpdate(const std::string& extension_id,
+                     const std::string& public_key,
+                     const base::FilePath& temp_dir,
+                     bool install_immediately,
+                     InstallUpdateCallback install_update_callback) override;
+  bool FinishDelayedInstallationIfReady(const std::string& extension_id,
+                                        bool install_immediately) override;
+
+ private:
+  void OnExtensionRegisteredWithRequestContexts(
+      scoped_refptr<Extension> extension);
+  content::BrowserContext* browser_context_;  // Not owned.
+
+  // Data to be accessed on the IO thread. Must outlive process_manager_.
+  scoped_refptr<InfoMap> info_map_;
+
+  std::unique_ptr<ServiceWorkerManager> service_worker_manager_;
+  std::unique_ptr<RuntimeData> runtime_data_;
+  std::unique_ptr<QuotaService> quota_service_;
+  std::unique_ptr<SharedUserScriptMaster> shared_user_script_master_;
+  std::unique_ptr<AppSorting> app_sorting_;
+
+  std::unique_ptr<AtomExtensionLoader> extension_loader_;
+
+  scoped_refptr<ValueStoreFactory> store_factory_;
+
+  // Signaled when the extension system has completed its startup tasks.
+  base::OneShotEvent ready_;
+
+  base::WeakPtrFactory<AtomExtensionSystem> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(AtomExtensionSystem);
+};
+
+}  // namespace extensions
+
+#endif  // SHELL_BROWSER_EXTENSIONS_ATOM_EXTENSION_SYSTEM_H_