Remove InstallTracker's extension installed, uninstalled observers.

chrome/browser/extensions/install_tracker.cc

Index: chrome/browser/extensions/install_tracker.cc
diff --git a/chrome/browser/extensions/install_tracker.cc b/chrome/browser/extensions/install_tracker.cc
index d3a19aa351fe42eebdac5018e1f6f89ada7edad0..52d9115775010c339bf9f50c580724ac6457d5d7 100644
--- a/chrome/browser/extensions/install_tracker.cc
+++ b/chrome/browser/extensions/install_tracker.cc
@@ -11,19 +11,12 @@
 #include "chrome/common/pref_names.h"
 #include "content/public/browser/notification_service.h"
 #include "extensions/browser/extension_prefs.h"
-#include "extensions/browser/extension_registry.h"
 #include "extensions/browser/pref_names.h"
 
 namespace extensions {
 
 InstallTracker::InstallTracker(Profile* profile,
-                               extensions::ExtensionPrefs* prefs)
-    : extension_registry_observer_(this) {
-  extension_registry_observer_.Add(ExtensionRegistry::Get(profile));
-
-  registrar_.Add(this,
-                 chrome::NOTIFICATION_EXTENSION_UNINSTALLED_DEPRECATED,
-                 content::Source<Profile>(profile));
+                               extensions::ExtensionPrefs* prefs) {
   registrar_.Add(this,
                  chrome::NOTIFICATION_EXTENSION_UPDATE_DISABLED,
                  content::Source<Profile>(profile));
@@ -98,14 +91,6 @@ void InstallTracker::Observe(int type,
                              const content::NotificationSource& source,
                              const content::NotificationDetails& details) {
   switch (type) {
-    case chrome::NOTIFICATION_EXTENSION_UNINSTALLED_DEPRECATED: {
-      const Extension* extension =
-          content::Details<const Extension>(details).ptr();
-
-      FOR_EACH_OBSERVER(InstallObserver, observers_,
-                        OnExtensionUninstalled(extension));
-      break;
-    }
     case chrome::NOTIFICATION_EXTENSION_UPDATE_DISABLED: {
       const Extension* extension =
           content::Details<const Extension>(details).ptr();
@@ -129,16 +114,6 @@ void InstallTracker::Observe(int type,
   }
 }
 
-void InstallTracker::OnExtensionWillBeInstalled(
-    content::BrowserContext* browser_context,
-    const Extension* extension,
-    bool is_update,
-    bool from_ephemeral,
-    const std::string& old_name) {
-  FOR_EACH_OBSERVER(
-      InstallObserver, observers_, OnExtensionInstalled(extension));
-}
-
 void InstallTracker::OnAppsReordered() {
   FOR_EACH_OBSERVER(InstallObserver, observers_, OnAppsReordered());
 }