Hook up runtime API to implement ExtensionRegistryObserver.

extensions/browser/api/runtime/runtime_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 EXTENSIONS_BROWSER_API_RUNTIME_RUNTIME_API_H_
 #define EXTENSIONS_BROWSER_API_RUNTIME_RUNTIME_API_H_
 
 #include <string>
 
+#include "base/scoped_observer.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "extensions/browser/api/runtime/runtime_api_delegate.h"
 #include "extensions/browser/browser_context_keyed_api_factory.h"
 #include "extensions/browser/extension_function.h"
+#include "extensions/browser/extension_registry_observer.h"
 #include "extensions/browser/process_manager_observer.h"
 #include "extensions/browser/update_observer.h"
 #include "extensions/common/api/runtime.h"
 
 namespace base {
 class Version;
 }
 
 namespace content {
 class BrowserContext;
 }
 
 namespace extensions {
 
 namespace core_api {
 namespace runtime {
 struct PlatformInfo;
 }
 }
 
 class Extension;
 class ExtensionHost;
 

[Devlin, 2014/07/23 15:26:44]

nit: Also forward-declare ExtensionRegistry.

[rpaquay, 2014/07/23 15:41:42]

Done.

 // Runtime API dispatches onStartup, onInstalled, and similar events to
 // extensions. There is one instance shared between a browser context and
 // its related incognito instance.
 class RuntimeAPI : public BrowserContextKeyedAPI,
                    public content::NotificationObserver,
+                   public ExtensionRegistryObserver,
                    public UpdateObserver,
                    public ProcessManagerObserver {
  public:
   static BrowserContextKeyedAPIFactory<RuntimeAPI>* GetFactoryInstance();
 
   explicit RuntimeAPI(content::BrowserContext* context);
   virtual ~RuntimeAPI();
 
   // content::NotificationObserver overrides:
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
   void ReloadExtension(const std::string& extension_id);
   bool CheckForUpdates(const std::string& extension_id,
                        const RuntimeAPIDelegate::UpdateCheckCallback& callback);
   void OpenURL(const GURL& uninstall_url);
   bool GetPlatformInfo(core_api::runtime::PlatformInfo* info);
   bool RestartDevice(std::string* error_message);
 
  private:
   friend class BrowserContextKeyedAPIFactory<RuntimeAPI>;
 
-  void OnExtensionsReady();
-  void OnExtensionLoaded(const Extension* extension);
-  void OnExtensionInstalled(const Extension* extension);
-  void OnExtensionUninstalled(const Extension* extension);
+  // ExtensionRegistryObserver implementation.
+  virtual void OnExtensionLoaded(content::BrowserContext* browser_context,
+                                 const Extension* extension) OVERRIDE;
+  virtual void OnExtensionWillBeInstalled(
+      content::BrowserContext* browser_context,
+      const Extension* extension,
+      bool is_update,
+      bool from_ephemeral,
+      const std::string& old_name) OVERRIDE;
+  virtual void OnExtensionUninstalled(content::BrowserContext* browser_context,
+                                      const Extension* extension,
+                                      UninstallReason reason) OVERRIDE;
 
   // BrowserContextKeyedAPI implementation:
   static const char* service_name() { return "RuntimeAPI"; }
   static const bool kServiceRedirectedInIncognito = true;
   static const bool kServiceIsNULLWhileTesting = true;
   virtual void Shutdown() OVERRIDE;
 
   // extensions::UpdateObserver overrides:
   virtual void OnAppUpdateAvailable(const Extension* extension) OVERRIDE;
   virtual void OnChromeUpdateAvailable() OVERRIDE;
 
   // ProcessManagerObserver implementation:
   virtual void OnBackgroundHostStartup(const Extension* extension) OVERRIDE;
 
   scoped_ptr<RuntimeAPIDelegate> delegate_;
 
   content::BrowserContext* browser_context_;
 
   // True if we should dispatch the chrome.runtime.onInstalled event with
   // reason "chrome_update" upon loading each extension.
   bool dispatch_chrome_updated_event_;
 
   content::NotificationRegistrar registrar_;
 
+  // Listen to extension notifications.
+  ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
+      extension_registry_observer_;
+
   DISALLOW_COPY_AND_ASSIGN(RuntimeAPI);
 };
 
 class RuntimeEventRouter {
  public:
   // Dispatches the onStartup event to all currently-loaded extensions.
   static void DispatchOnStartupEvent(content::BrowserContext* context,
                                      const std::string& extension_id);
 
   // Dispatches the onInstalled event to the given extension.
@@ skipping 13 matching lines @@
       content::BrowserContext* context);
 
   // Dispatches the onRestartRequired event to the given app.
   static void DispatchOnRestartRequiredEvent(
       content::BrowserContext* context,
       const std::string& app_id,
       core_api::runtime::OnRestartRequired::Reason reason);
 
   // Does any work needed at extension uninstall (e.g. load uninstall url).
   static void OnExtensionUninstalled(content::BrowserContext* context,
-                                     const std::string& extension_id);
+                                     const std::string& extension_id,
+                                     UninstallReason reason);
 };
 
 class RuntimeGetBackgroundPageFunction : public UIThreadExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("runtime.getBackgroundPage",
                              RUNTIME_GETBACKGROUNDPAGE)
 
  protected:
   virtual ~RuntimeGetBackgroundPageFunction() {}
   virtual ResponseAction Run() OVERRIDE;
@@ skipping 59 matching lines @@
                              RUNTIME_GETPACKAGEDIRECTORYENTRY)
 
  protected:
   virtual ~RuntimeGetPackageDirectoryEntryFunction() {}
   virtual ResponseAction Run() OVERRIDE;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_RUNTIME_RUNTIME_API_H_