Remove NOTIFICATION_EXTENSION_ENABLED.

extensions/browser/api/runtime/runtime_api.cc

Index: extensions/browser/api/runtime/runtime_api.cc
diff --git a/extensions/browser/api/runtime/runtime_api.cc b/extensions/browser/api/runtime/runtime_api.cc
index 11b8f758f56a819e41c73c945e49fde2d5607cf1..4f5137a03508b97166d073018eb9aff13892cfec 100644
--- a/extensions/browser/api/runtime/runtime_api.cc
+++ b/extensions/browser/api/runtime/runtime_api.cc
@@ -25,6 +25,7 @@
 #include "content/public/browser/render_process_host.h"
 #include "extensions/browser/api/runtime/runtime_api_delegate.h"
 #include "extensions/browser/event_router.h"
+#include "extensions/browser/events/lazy_event_dispatch_util.h"
 #include "extensions/browser/extension_host.h"
 #include "extensions/browser/extension_prefs.h"
 #include "extensions/browser/extension_registry.h"
@@ -68,15 +69,6 @@ const char kUpdatesDisabledError[] = "Autoupdate is not enabled.";
 // A preference key storing the url loaded when an extension is uninstalled.
 const char kUninstallUrl[] = "uninstall_url";
 
-// A preference key storing the information about an extension that was
-// installed but not loaded. We keep the pending info here so that we can send
-// chrome.runtime.onInstalled event during the extension load.
-const char kPrefPendingOnInstalledEventDispatchInfo[] =
-    "pending_on_installed_event_dispatch_info";
-
-// Previously installed version number.
-const char kPrefPreviousVersion[] = "previous_version";
-
 // The name of the directory to be returned by getPackageDirectoryEntry. This
 // particular value does not matter to user code, but is chosen for consistency
 // with the equivalent Pepper API.
@@ -218,6 +210,10 @@ RuntimeAPI::RuntimeAPI(content::BrowserContext* context)
   // per browser context, since it updates internal state when called.
   dispatch_chrome_updated_event_ =
       ExtensionsBrowserClient::Get()->DidVersionUpdate(browser_context_);
+
+  EventRouter::Get(browser_context_)
+      ->lazy_event_dispatch_util()
+      ->AddObserver(this);
 }
 
 RuntimeAPI::~RuntimeAPI() {
@@ -225,15 +221,6 @@ RuntimeAPI::~RuntimeAPI() {
 
 void RuntimeAPI::OnExtensionLoaded(content::BrowserContext* browser_context,
                                    const Extension* extension) {
-  base::Version previous_version;
-  if (ReadPendingOnInstallInfoFromPref(extension->id(), &previous_version)) {
-    base::ThreadTaskRunnerHandle::Get()->PostTask(
-        FROM_HERE,
-        base::Bind(&RuntimeEventRouter::DispatchOnInstalledEvent,
-                   browser_context_, extension->id(), previous_version, false));
-    RemovePendingOnInstallInfoFromPref(extension->id());
-  }
-
   if (!dispatch_chrome_updated_event_)
     return;
 
@@ -244,30 +231,19 @@ void RuntimeAPI::OnExtensionLoaded(content::BrowserContext* browser_context,
                  browser_context_, extension->id(), base::Version(), true));
 }
 
-void RuntimeAPI::OnExtensionWillBeInstalled(
-    content::BrowserContext* browser_context,
-    const Extension* extension,
-    bool is_update,
-    const std::string& old_name) {
-  // This extension might be disabled before it has a chance to load, e.g. if
-  // the extension increased its permissions. So instead of trying to send the
-  // onInstalled event here, we remember the fact in prefs and fire the event
-  // when the extension is actually loaded.
-  StorePendingOnInstallInfoToPref(extension);
-}
-
 void RuntimeAPI::OnExtensionUninstalled(
     content::BrowserContext* browser_context,
     const Extension* extension,
     UninstallReason reason) {
-  RemovePendingOnInstallInfoFromPref(extension->id());
-
   RuntimeEventRouter::OnExtensionUninstalled(
       browser_context_, extension->id(), reason);
 }
 
 void RuntimeAPI::Shutdown() {
   delegate_->RemoveUpdateObserver(this);
+  EventRouter::Get(browser_context_)
+      ->lazy_event_dispatch_util()
+      ->RemoveObserver(this);
 }
 
 void RuntimeAPI::OnAppUpdateAvailable(const Extension* extension) {
@@ -283,53 +259,6 @@ void RuntimeAPI::OnBackgroundHostStartup(const Extension* extension) {
   RuntimeEventRouter::DispatchOnStartupEvent(browser_context_, extension->id());
 }
 
-bool RuntimeAPI::ReadPendingOnInstallInfoFromPref(
-    const ExtensionId& extension_id,
-    base::Version* previous_version) {
-  ExtensionPrefs* prefs = ExtensionPrefs::Get(browser_context_);
-  DCHECK(prefs);
-
-  const base::DictionaryValue* info = nullptr;
-  if (!prefs->ReadPrefAsDictionary(
-          extension_id, kPrefPendingOnInstalledEventDispatchInfo, &info)) {
-    return false;
-  }
-
-  std::string previous_version_string;
-  info->GetString(kPrefPreviousVersion, &previous_version_string);
-  // |previous_version_string| can be empty.
-  *previous_version = base::Version(previous_version_string);
-  return true;
-}
-
-void RuntimeAPI::RemovePendingOnInstallInfoFromPref(
-    const ExtensionId& extension_id) {
-  ExtensionPrefs* prefs = ExtensionPrefs::Get(browser_context_);
-  DCHECK(prefs);
-
-  prefs->UpdateExtensionPref(extension_id,
-                             kPrefPendingOnInstalledEventDispatchInfo, nullptr);
-}
-
-void RuntimeAPI::StorePendingOnInstallInfoToPref(const Extension* extension) {
-  ExtensionPrefs* prefs = ExtensionPrefs::Get(browser_context_);
-  DCHECK(prefs);
-
-  // |pending_on_install_info| currently only contains a version string. Instead
-  // of making the pref hold a plain string, we store it as a dictionary value
-  // so that we can add more stuff to it in the future if necessary.
-  std::unique_ptr<base::DictionaryValue> pending_on_install_info(
-      new base::DictionaryValue());
-  base::Version previous_version = ExtensionRegistry::Get(browser_context_)
-                                       ->GetStoredVersion(extension->id());
-  pending_on_install_info->SetString(
-      kPrefPreviousVersion,
-      previous_version.IsValid() ? previous_version.GetString() : "");
-  prefs->UpdateExtensionPref(extension->id(),
-                             kPrefPendingOnInstalledEventDispatchInfo,
-                             std::move(pending_on_install_info));
-}
-
 void RuntimeAPI::ReloadExtension(const std::string& extension_id) {
   delegate_->ReloadExtension(extension_id);
 }
@@ -634,6 +563,16 @@ void RuntimeEventRouter::OnExtensionUninstalled(
   RuntimeAPI::GetFactoryInstance()->Get(context)->OpenURL(uninstall_url);
 }
 
+void RuntimeAPI::OnExtensionInstalledAndLoaded(
+    content::BrowserContext* browser_context,
+    const Extension* extension,
+    const base::Version& previous_version) {
+  base::ThreadTaskRunnerHandle::Get()->PostTask(
+      FROM_HERE,
+      base::Bind(&RuntimeEventRouter::DispatchOnInstalledEvent,
+                 browser_context_, extension->id(), previous_version, false));
+}
+
 ExtensionFunction::ResponseAction RuntimeGetBackgroundPageFunction::Run() {
   ExtensionHost* host = ProcessManager::Get(browser_context())
                             ->GetBackgroundHostForExtension(extension_id());