Use ExtensionRegistryObserver instead of deprecated extension notification from autocomplete

chrome/browser/autocomplete/shortcuts_provider_unittest.cc

Index: chrome/browser/autocomplete/shortcuts_provider_unittest.cc
diff --git a/chrome/browser/autocomplete/shortcuts_provider_unittest.cc b/chrome/browser/autocomplete/shortcuts_provider_unittest.cc
index bb3ca8d0ebe06b7336d5a1e7c12e9589084cb3a8..a2a8b1afa1c7e8bf193fbd5be5791153da5d2f50 100644
--- a/chrome/browser/autocomplete/shortcuts_provider_unittest.cc
+++ b/chrome/browser/autocomplete/shortcuts_provider_unittest.cc
@@ -32,6 +32,7 @@
 #include "chrome/test/base/testing_profile.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/test/test_browser_thread.h"
+#include "extensions/browser/extension_registry.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/extension_builder.h"
 #include "extensions/common/value_builder.h"
@@ -841,12 +842,10 @@ TEST_F(ShortcutsProviderTest, Extension) {
               .Set("version", "1.0"))
           .SetID("cedabbhfglmiikkmdgcpjdkocfcmbkee")
           .Build();
-  extensions::UnloadedExtensionInfo details(
+  extensions::ExtensionRegistry* registry =
+      extensions::ExtensionRegistry::Get(&profile_);
+  registry->TriggerOnUnloaded(
       extension.get(), extensions::UnloadedExtensionInfo::REASON_UNINSTALL);
-  content::NotificationService::current()->Notify(
-      chrome::NOTIFICATION_EXTENSION_UNLOADED_DEPRECATED,
-      content::Source<Profile>(&profile_),
-      content::Details<extensions::UnloadedExtensionInfo>(&details));
 
   // Now the URL should have disappeared.
   RunTest(text, false, ExpectedURLs(), std::string(), base::string16());