[Extensions] Rework inline installation observation

chrome/browser/extensions/api/webstore/webstore_api.h

-// 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 CHROME_BROWSER_EXTENSIONS_API_WEBSTORE_WEBSTORE_API_H_
-#define CHROME_BROWSER_EXTENSIONS_API_WEBSTORE_WEBSTORE_API_H_
-
-#include <list>
-#include <memory>
-#include <string>
-
-#include "base/macros.h"
-#include "base/scoped_observer.h"
-#include "chrome/browser/extensions/install_observer.h"
-#include "chrome/common/extensions/api/webstore/webstore_api_constants.h"
-#include "extensions/browser/browser_context_keyed_api_factory.h"
-#include "extensions/browser/event_router.h"
-
-namespace base {
-class ListValue;
-}
-
-namespace content {
-class BrowserContext;
-}
-
-namespace IPC {
-class Sender;
-}
-
-namespace extensions {
-class InstallTracker;
-
-class WebstoreAPI : public BrowserContextKeyedAPI,
-                    public InstallObserver {
- public:
-  explicit WebstoreAPI(content::BrowserContext* browser_context);
-  ~WebstoreAPI() override;
-
-  static WebstoreAPI* Get(content::BrowserContext* browser_context);
-
-  // Called whenever an inline extension install is started. Examines
-  // |listener_mask| to determine if a download progress or install
-  // stage listener should be added.
-  // |routing_id| refers to the id to which we send any return messages;
-  // |ipc_sender| is the sender through which we send them (typically this
-  // is the TabHelper which started the inline install).
-  void OnInlineInstallStart(int routing_id,
-                            IPC::Sender* ipc_sender,
-                            const std::string& extension_id,
-                            int listener_mask);
-
-  // Called when an inline extension install finishes. Removes any listeners
-  // related to the |routing_id|-|extension_id| pair.
-  void OnInlineInstallFinished(int routing_id, const std::string& extension_id);
-
-  // BrowserContextKeyedAPI implementation.
-  static BrowserContextKeyedAPIFactory<WebstoreAPI>* GetFactoryInstance();
-
- private:
-  friend class BrowserContextKeyedAPIFactory<WebstoreAPI>;
-
-  // A simple struct to hold our listeners' information for each observed
-  // install.
-  struct ObservedInstallInfo;
-  typedef std::list<ObservedInstallInfo> ObservedInstallInfoList;
-
-  // Sends an installation stage update message if we are observing
-  // the extension's install.
-  void SendInstallMessageIfObserved(const std::string& extension_id,
-                                    api::webstore::InstallStage install_stage);
-
-  // Removes listeners for the given |extension_id|-|routing_id| pair from
-  // |listeners|.
-  void RemoveListeners(int routing_id,
-                       const std::string& extension_id,
-                       ObservedInstallInfoList* listeners);
-
-  // InstallObserver implementation.
-  void OnBeginExtensionDownload(const std::string& extension_id) override;
-  void OnDownloadProgress(const std::string& extension_id,
-                          int percent_downloaded) override;
-  void OnBeginCrxInstall(const std::string& extension_id) override;
-  void OnShutdown() override;
-
-  // BrowserContextKeyedService implementation.
-  void Shutdown() override;
-
-  // BrowserContextKeyedAPI implementation.
-  static const char* service_name() { return "WebstoreAPI"; }
-  static const bool kServiceIsNULLWhileTesting = true;
-
-  ObservedInstallInfoList download_progress_listeners_;
-  ObservedInstallInfoList install_stage_listeners_;
-  content::BrowserContext* browser_context_;
-  std::unique_ptr<ScopedObserver<InstallTracker, InstallObserver>>
-      install_observer_;
-
-  DISALLOW_COPY_AND_ASSIGN(WebstoreAPI);
-};
-
-}  // namespace extensions
-
-#endif  // CHROME_BROWSER_EXTENSIONS_API_WEBSTORE_WEBSTORE_API_H_